The solution is the coordinate point (-1, 4)
How to solve the system of equations?Here we need to solve the system of equations in the diagram. Notice that the system is already graphed, the solutions are all the points where the graphs intercept.
Here we can see that there is one interception point so there is only one soluition, which is at the coordinate point (-1, 4), so that is the solution of the system.
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Find the radius of convergence, R, of the series.[infinity]∑n=2(x+4)n4nln(n)Also, find the interval, I, of convergence of this series. (Enter your answer using interval notation.)
The series converges for all values of x within the interval (-5, -3).
To find the radius of convergence, we can make use of the ratio test. According to the ratio test, if we have a series ∑aₙ, and the limit of the absolute value of the ratio of consecutive terms aₙ₊₁/aₙ, as n approaches infinity, exists and is equal to L, then the series converges absolutely if L < 1 and diverges if L > 1.
For the series to converge, we need |x+4| < 1, which means that the absolute value of (x+4) should be less than 1. Thus, we can conclude that the radius of convergence, R, is 1.
To find the interval of convergence, I, we need to determine the values of x for which the series converges. Since the series converges when |x+4| < 1, we can set up the following inequality:
|x+4| < 1
To solve this inequality, we can consider two cases:
When x+4 > 0:
In this case, the inequality becomes:
x+4 < 1
x < -3
When x+4 < 0:
In this case, we need to consider the absolute value, so the inequality becomes:
-(x+4) < 1
x > -5
Combining both cases, we have -5 < x < -3 as the interval of convergence, I.
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if s= a b c with p(a)=6p(b)=8p(c) find p(a)
The given information states that s = abc, and p(a) = 6p(b) = 8p(c). To find p(a), we need to know the value of one of the other c, so let's choose p(c) = k. Then, we have p(b) = (3/4)k and p(a) = (1/2)k.
Substituting these values into the expression for s, we get s = abc = (1/2)k * (3/4)k * k = (3/8)k^3. To solve for k, we can use the fact that the probabilities must add up to 1: p(a) + p(b) + p(c) = 1. Substituting in the expressions for p(a), p(b), and p(c), we get (1/2)k + (3/4)k + k = 1, or (5/4)k = 1/2. Solving for k, we get k = 2/5. Finally, substituting this value of k back into the expression for p(a), we get p(a) = (1/2)k = (1/2)(2/5) = 1/5. Therefore, p(a) = 1/5.
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Giving out brainliest
Please help Asap
Answer: B.
Step-by-step explanation:
Match the expression on the left with the correct simplified expression on the right.
(x+4)²
(x+4)(x-4).
x²
x²16
x² + 16
x² + 8x + 16
x² + 16x + 16
By Using Identity:-
[tex] \quad \hookrightarrow \: { \underline{ \overline{ \boxed{ \pmb{ \sf{ {(a + b)}^{2} = \: {a}^{2} + {b}^{2} + 2ab \: }}}}}} \: \red \bigstar \\ [/tex]
[tex] \sf \longrightarrow \: {(x + 4)}^{2} [/tex]
[tex] \sf \longrightarrow \: {x}^{2} + {4}^{2} + 2 \times 4 \times x[/tex]
[tex] \sf \longrightarrow \: {x}^{2} + {4}^{2} + 8 \times x[/tex]
[tex] \sf \longrightarrow \: {x}^{2} + {4}^{2} + 8 x[/tex]
[tex] \sf \longrightarrow \: {x}^{2} + 16 + 8 x[/tex]
[tex] \sf \longrightarrow \: {x}^{2} + 8 x + 16[/tex]
Therefore ,
(x+4)² = x² + 8x + 16________________________________________
2) ( x+4 ) ( x-4 )[tex] \sf \longrightarrow \: ( x+4 ) ( x-4 )[/tex]
[tex] \sf \longrightarrow \: x ( x - 4 ) + 4( x-4 )[/tex]
[tex] \sf \longrightarrow \: {x}^{2} - 4x + 4x - 16[/tex]
[tex] \sf \longrightarrow \: {x}^{2} - 0 - 16[/tex]
[tex] \sf \longrightarrow \: {x}^{2} -16[/tex]
Therefore,
( x+4 ) ( x-4 ) = x² - 16________________________________________
find the surface area of the prism. 9.4, 12mm, 8mm and 5mm
if a function f(x) with f(3)=15 is continuous at x=3, then f(x) is differentiable at x=3
The statement is not necessarily true. Continuity at a point does not guarantee differentiability at that point.
A function can be continuous but not differentiable at a certain point if it has a sharp corner or a vertical tangent at that point. However, if a function is differentiable at a point, it must also be continuous at that point.
This is because differentiability implies continuity, but continuity does not imply differentiability. Therefore, it is possible for a function to be continuous at x=3 and not differentiable at x=3.
Additional information, such as the existence and continuity of the derivative, is needed to determine if a function is differentiable at a given point.
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find a · b. |a| = 2, |b| = 7, the angle between a and b is 2/3
The product of vectors a and b is approximately 5.292.
To find the product of two vectors a and b, we need to use the dot product formula which is a · b = |a| |b| cosθ, where |a| and |b| are the magnitudes of vectors a and b, and θ is the angle between them.
In this case, we are given that |a| = 2 and |b| = 7, and the angle between a and b is 2/3. We can use this information to find cosθ as follows:
cosθ = cos(2/3) ≈ 0.378
Now, we can substitute the values into the formula:
a · b = |a| |b| cosθ
a · b = 2 * 7 * 0.378
a · b ≈ 5.292
Therefore, the product of vectors a and b is approximately 5.292.
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Divide:
4x3 + 2x2 + 3x + 4 by x + 4
USE LONG DIVISION SHOW ALL WORK!
THANK YOU!!
Answer:
Here are the steps to divide 4x^3 + 2x^2 + 3x + 4 by x + 4 using long division:
```
4x^2 - 14x + 59
________________________
x + 4 | 4x^3 + 2x^2 + 3x + 4
- (4x^3 + 16x^2)
---------------------
-14x^2 + 3x
-(-14x^2) - 56x
----------------
59x + 4
59x + 236
--------
-232
```
Therefore, the quotient is 4x^2 - 14x + 59, and the remainder is -232.
10. 39 the bitwise operators can be used to manipulate the bits of variables of type __________. A) float b) double c) long d) long double
The bitwise operators can be used to manipulate the bits of variables of long type.
What are operators?
Operators are language-defined structures used in computer programming that operate broadly like functions but have syntactic or semantic differences. Logic operations, comparison, and arithmetic are a few instances of common elementary examples.
Here, we have
The bitwise operators can be used to manipulate the bits of variables of type.
Consider the right shift operation for float or double.
Float and double are represented using IEEE 754 Floating point representation.
This is IEEE-754 32-bit Single-Precision Floating-Point Number Representation.
In this representation, the first bit is the sign bit.
The sign bit indicates whether the number is positive or negative.
If the sign bit is 1, the number is positive and if it is 0, the number is negative.
If we apply the right shift, the sign bit is pushed into the exponent and the least significant bit is pushed into the fraction.
For a right shift, generally, the empty bit is replaced by 0.
If the sign bit before shifting was 1, means the number was positive.
On shifting it becomes negative. This makes the interpretation complicated.
That is the reason bitwise operators are generally not allowed with float or double.
Therefore,
The bitwise operators can be used to manipulate the bits of variables of long type.
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order the rational numbers -10,2,-0.5, and 5/16 from least to greatest
Answer: -10 < -0.5 < 0.3125 < 2
Find the volume of the square pyramid shown. Round to the nearest tenth as necessary.
a 70 cm
b. 229.7 cm
c. 1575 cm
d. 1050 cm³
The volume of the square pyramid that has sides of length 15 cm and height of 14 cm is: D. 1050 cm³
How to Find the Volume of a Square Pyramid?To find the volume of a square pyramid, you can use the formula: Volume = (1/3) * Base Area * Height.
Since the base of the square pyramid has sides of length 15 cm, the base area can be calculated as:
Base area = 15 cm * 15 cm
= 225 cm².
Plugging the values into the formula, the volume of the pyramid:
= (1/3) * 225 * 14 cm
= 1050 cm³.
Therefore, the volume of the square pyramid is 1050 cm³.
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How many packages of military dynamite (m1) are required to create a relieved-face crater that is 120 feet long?
The number of packages that are required to create a relieved-face crater of the given length would be = 37 packages.
How to calculate the number of packages needed?To calculate the number of packages that are required to create a relieved-face crater of the given length, the length is converted to meters.
To convert 120 feet to meters divide the value by 3.281. That is, = 120/3.281 = 36.6m
But if 1 m = package
36.6 m = 36.6
= 37 packages
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find ||u|| and d(u,v) relative to the standard inner product on m22. u = [39 276], v = [-64 19]
The norm of u is 276.46 and the distance between u and v is 259.98 in M22 with the standard inner product.
To find the norm ||u|| of the vector u=[39 276] in M22 with the standard inner product, we use the formula:
||u|| = sqrt(<u,u>)
where <u,u> is the dot product of u with itself.
<u,u> = (39 * 39) + (276 * 276) = 76461
Therefore, ||u|| = sqrt(76461) = 276.46 (rounded to two decimal places).
To find the distance d(u,v) between vectors u=[39 276] and v=[-64 19] in M22 with the standard inner product, we use the formula:
d(u,v) = sqrt(<u-v,u-v>)
where <u-v,u-v> is the dot product of the difference between u and v with itself.
<u-v,u-v> = (39 - (-64))^2 + (276 - 19)^2 = 12769 + 54756 = 67525
Therefore, d(u,v) = sqrt(67525) = 259.98 (rounded to two decimal places).
Therefore, the norm of u is 276.46 and the distance between u and v is 259.98 in M22 with the standard inner product.
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find the area bounded by the curvex = t - 1/t y = t 1/t and the line y=26/5.
The find the area bounded by the curve is: ≈ 2.713 square units
How to find the area?To find the area bounded by the curve, we need to find the points of intersection of the curve and the line y=26/5.
We know that y = t * 1/t = 1 for all values of t except t = 0.
So, the curve is a straight line passing through the point (-1, -1) and (1, 1).
The equation of this line is y = x.
Now, we need to find the x-coordinate of the point where the line y=26/5 intersects the curve.
Setting y = 26/5 in the equation y = x, we get x = 26/5.
So, the points of intersection are (-26/5, 26/5) and (26/5, 26/5).
To find the area bounded by the curve and the line y=26/5, we integrate the difference between the curves over the interval of x from -26/5 to 26/5:
∫[tex](-26/5)^(^2^6^/^5^)[/tex] (y - x) dx
= ∫[tex](-26/5)^(^2^6^/^5^)[/tex](t - 1/t - x) dt
= ∫[tex](-26/5)^(^2^6^/^5^)[/tex] (t - x - 1/t) dt
We can simplify this by noting that the expression inside the integral is the derivative of (t²)/2 - xt - ln(t) with respect to t.
So, the area is equal to the antiderivative of the above expression evaluated at the limits of integration:
= [[tex](26/5)^2^/^2[/tex] - [tex](26/5)^2^/^2[/tex] - 2ln(26/5)] - [[tex](-26/5)^2^/^2[/tex] - (-[tex]26/5)^2^/^2[/tex] - 2ln(-26/5)]
= [-(2ln(26/5) + 2ln(26/5))] - [-(2ln(-26/5) + 2ln(26/5))]
= 4ln(26/5)
≈ 2.713 square units.
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You launch a water balloon. The function h=-0.08t^2+1.6t+2 models the height h (in feet) of the water balloon after t seconds. After how many seconds does the water balloon hit the ground?
angles congruent to ZRSM.
Ba
of f
DTV
Find all solutions of the equation 2cosx−1=0.2cosx-1=0. The answer is A+BkπA+Bkπ and C+DkπC+Dkπwhere kk is any integer, 0
The solutions to the equation 2cos(x) - 1 = 0.2cos(x) - 1 = 0 are given by x = cos^(-1)(5/9) + 2kπ, where k is an integer.
To solve the equation 2cos(x) - 1 = 0.2cos(x) - 1 = 0, we can simplify it as follows:
2cos(x) - 1 = 0.2cos(x) - 1
Subtracting 0.2cos(x) from both sides:
2cos(x) - 0.2cos(x) = 1
Combining like terms:
1.8cos(x) = 1
Now, we isolate cos(x) by dividing both sides by 1.8:
cos(x) = 1/1.8
cos(x) = 5/9
To find the solutions, we need to consider the values of cos(x) that satisfy the equation. Since cos(x) can take any value between -1 and 1, we can find the corresponding angles by taking the inverse cosine (cos^(-1)) of 5/9:
x = cos^(-1)(5/9) + 2kπ
where k is any integer, and π represents pi.
Therefore, the solutions of the equation 2cos(x) - 1 = 0.2cos(x) - 1 = 0 are given by:
x = cos^(-1)(5/9) + 2kπ, where k is any integer.
Note that the solutions are in the form of A + Bkπ, where A and B are constants derived from cos^(-1)(5/9), and k is an integer.
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Anyone who answers will get Brainly
Answer:
Line A slope = -1
Line B Slope =0.5
Double? That wouldn't be correct but your teacher may be not smart.
The equation for line A: y=-x-2
Values from Line B: (In the picture below)
Step 1:Find the slope for y= -x-2
[tex]y=-x-2,[/tex]
[tex]y+x= -2[/tex]
[tex]m= -1[/tex]
The slope for y= -x-2 is m= -1
Step 2:I promise I will finish this once im done with my dinner :)
What is the probability of randomly selecting a quarter from a bag that has 5 dimes, 6 quarters, 2 nickels, and 3 pennies?
3/8
1/8
5/16
3/16
Answer:
3/8
Step-by-step explanation:
there are 5 + 6 + 2 + 3 = 16 coins.
there are 6 quarters.
probability, p, of selecting a quarter = p(quarter) = 6/16 = 3/8
A triangle is defined by the three points: A = (7, 7) B = (2, 2), and C = (4, 8). Determine all three angles in the triangle (in radians).
The three angles in the triangle ABC are approximately 0.45 radians (A and C) and 1.37 radians (B).
To determine the three angles in the triangle ABC, we can use the law of cosines, which relates the lengths of the sides of a triangle to the cosine of the angles opposite those sides. The law of cosines states that for a triangle with sides a, b, and c, and angles A, B, and C opposite those sides:
```
a^2 = b^2 + c^2 - 2bc cos(A)
b^2 = a^2 + c^2 - 2ac cos(B)
c^2 = a^2 + b^2 - 2ab cos(C)
```
We can use these equations to solve for the three angles in the triangle ABC.
First, we need to find the lengths of the sides of the triangle. We can use the distance formula to find the lengths of the sides AB, BC, and AC:
```
AB = sqrt((7-2)^2 + (7-2)^2) = sqrt(50)
BC = sqrt((4-2)^2 + (8-2)^2) = sqrt(52)
AC = sqrt((7-4)^2 + (7-8)^2) = sqrt(10)
```
Now we can use the law of cosines to solve for the angles:
```
cos(A) = (b^2 + c^2 - a^2) / 2bc
cos(B) = (a^2 + c^2 - b^2) / 2ac
cos(C) = (a^2 + b^2 - c^2) / 2ab
```
```
cos(A) = (50 + 10 - 52) / (2 * sqrt(50) * sqrt(10)) = 0.9
cos(B) = (50 + 52 - 10) / (2 * sqrt(50) * sqrt(52)) = 0.2
cos(C) = (10 + 52 - 50) / (2 * sqrt(10) * sqrt(52)) = 0.9
```
Now we can use the inverse cosine function to find the values of A, B, and C:
```
A = acos(0.9) ≈ 0.45 radians
B = acos(0.2) ≈ 1.37 radians
C = acos(0.9) ≈ 0.45 radians
```
Therefore, the three angles in the triangle ABC are approximately 0.45 radians (A and C) and 1.37 radians (B).
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A pyramid has 7 faces , including the base. How many edges does it have?
Answer:
12 edges
Step-by-step explanation:
A pyramid with 7 faces is a hexagonal pyramid. It has 12 edges
a 99% confidence interval estimate can be interpreted to mean thata.we are 99% confident that the true population mean is covered by the calculated confidence interval. b.the probability that the calculated confidence interval covers the sample mean is 0.99.c.if all possible samples of size n are taken and confidence interval estimates are developed, 99% of them would include the sample mean somewhere within their interval.d.we are sure that the calculated confidence interval covers the true population mean.
The correct interpretation for a 99% confidence interval estimate is (a) "we are 99% confident that the true population mean is covered by the calculated confidence interval."
This means that if we were to repeat the sampling procedure many times and calculate a confidence interval each time, about 99% of these intervals would contain the true population mean. It does not mean that there is a 99% probability that the population mean lies within the calculated interval, and it does not guarantee that the calculated interval contains the true population mean. The correct interpretation for a 99% confidence interval estimate is (a) "we are 99% confident that the true population mean is covered by the calculated confidence interval."
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the length of a rectangle is 7 centimeters less than five times its width. its area is 6 square centimeters. find the dimensions of the rectangle.
If the length of a rectangle is 7 centimeters less than five times its width, the dimensions of the rectangle are 2 cm × 3 cm.
Let x be the width of the rectangle in centimeters. Then, the length of the rectangle is 5x - 7 centimeters.
The formula for the area of a rectangle is A = lw, where A is the area, l is the length, and w is the width. In this case, we are given that the area is 6 square centimeters, so we can set up the equation:
6 = (5x - 7)x
Expanding the expression on the right side, we get:
6 = 5x² - 7x
Moving all terms to one side, we obtain:
5x² - 7x - 6 = 0
We can now solve for x using the quadratic formula:
x = (-b ± √(b² - 4ac)) / 2a
where a = 5, b = -7, and c = -6.
Plugging in these values, we get:
x = (7 ± √(7² - 4(5)(-6))) / 2(5)
x = (7 ± √(169)) / 10
x = (7 ± 13) / 10
The two possible values for x are x = 2 and x = -1/5. Since the width cannot be negative, we reject the negative solution and conclude that the width of the rectangle is 2 centimeters. Therefore, the length of the rectangle is 5(2) - 7 = 3 centimeters.
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Write the given system of equations as a matrix equation and solve by using inverses. 7x1 + 3X2= k1 -2x1-X2= k2 a. What are X, and x2 when k, = - 4 and k, = 0? X1 X2=
The determinant of matrix A matrix equation when k1 = -4 and k2 = 0, we have x1 = -12/23 and x2 = 4/23.
The given system of equations can be written as a matrix equation as follows:
A * X = K
where
A = [[7, 3], [-2, -1]]
X = [x1, x2]
K = [k1, k2]
To solve for X, we can use the inverse of matrix A as follows:
X = A^-1 * K
To find the inverse of matrix A, we can use the formula:
A^-1 = (1/det(A)) * [[-1, -3], [2, 7]]
where det(A) is the determinant of matrix A.
Plugging in the values of A^-1 and K, we get:
X = (1/det(A)) * [[-1, -3], [2, 7]] * [-4, 0]
X = [-12/23, 4/23]
Therefore, when k1 = -4 and k2 = 0, we have x1 = -12/23 and x2 = 4/23.
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If sin(x)=2/9, x is in quadrant 1, then find (without finding x). Please show all work.sin(2x)cos(2x)tan(2x)
Using the double angle formulas for sine and cosine, we can find sin(2x) and cos(2x) as follows:
sin(2x) = 2sin(x)cos(x) = 2(2/9)(√(1 - (2/9)^2)) = 4√65/81
cos(2x) = cos^2(x) - sin^2(x) = (1 - sin^2(x)) - sin^2(x) = 1 - 2sin^2(x) = 1 - 2(2/9)^2 = 77/81
Finally, we can use the formula for tangent in terms of sine and cosine to find tan(2x):
tan(2x) = sin(2x)/cos(2x) = (4√65/81)/(77/81) = (4/77)√65
Therefore, sin(2x)cos(2x)tan(2x) = (4√65/81)(77/81)(4/77)√65 = 16/81.
In summary, sin(2x) = 4√65/81, cos(2x) = 77/81, and tan(2x) = (4/77)√65. So, sin(2x)cos(2x)tan(2x) = 16/81.
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if the area of a right triangle is 9/16 sq. ft. and the height is 3/4 ft,write an equation that relates the area to the base,b, and the height. Solve the equation to detyermine the base.
The base of the right triangle is 3/2 ft.
The area of a right triangle is given by the formula:
Area = (base × height) / 2
We are given that the area of the triangle is 9/16 sq. ft. and the height is 3/4 ft. So, substituting these values in the above formula, we get:
9/16 = (base × 3/4) / 2
Multiplying both sides by 2, we get:
9/8 = base × 3/4
Dividing both sides by 3/4, we get:
9/8 ÷ 3/4 = base
Simplifying, we get:
9/8 × 4/3 = base
3/2 = base
Therefore, the base of the right triangle is 3/2 ft.
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in a two-way analysis of variance, a researcher tests for the significance of: group of answer choices three main effects. one main effect and an interaction. two interactions. two main effects and an interaction.
In a two-way analysis of variance, a researcher tests for the significance of two main effects and an interaction.
What is two-way analysis of variance?A statistical test called two-way analysis of variance (ANOVA) compares the means of many groups using two independent variables (factors) and one dependent variable.
In a two-way analysis of variance (ANOVA), the researcher tests for the significance of two main effects and an interaction effect between two independent variables (factors) on a dependent variable. The main effects refer to the individual effect of each factor on the dependent variable, while the interaction effect refers to the combined effect of both factors on the dependent variable. Thus, the researcher aims to examine how each independent variable affects the dependent variable separately (main effects) and how their combination affects the dependent variable (interaction effect).
Therefore, in a two-way analysis of variance, a researcher tests for the significance of two main effects and an interaction.
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osses follow an exponential distribution with mean 1. two independent losses are observed. calculate the expected value of the smaller loss.
The expected value of the smaller loss can be found using the properties of the exponential distribution.
Since the exponential distribution is memoryless, the probability of the first loss being the smaller loss is the same as the probability of the second loss being the smaller loss. Therefore, the expected value of the smaller loss is half of the expected value of the minimum of two exponential random variables.
The minimum of two independent exponential random variables with the same mean is known to follow an Erlang distribution with parameters k=2 and λ=1. Therefore, the expected value of the minimum of two exponential random variables with mean 1 is given by 2/λ = 2.
Thus, the expected value of the smaller loss is 1, which is half of the expected value of the minimum of two exponential random variables.
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Simplify this question
8. F²* F by the power of 4
A.(2F) by the power of 8
B.(2F) by the power of 6
C F by the power 8
D. F by the power of 6
The expression is simplified to F⁸. Option C
How to determine the valueTo determine the value, we have that;
Index forms are described as forms used in the representation of numbers that are too small or large.
Other names for index forms are scientific notation and standard forms.
From the information given, we have that
F² by the power of 4
This is represented as;
(F²)⁴
To simply the index form, we need to expand the bracket by multiplying the exponential values, we get;
F⁸
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1. You want to plant a flower garden in your yard so that you can make a beautiful bouquet to put on the alter at church for Easter Sunday services. There are two types of flowers that you are going to be planting. You will be planting some tulips and daffodils. At the store tulips come in packs of 6 and daffodils come in packs of 9.
a.What is the least amount of packs of daffodils and tulips you would need to buy to have the same amount of each?
b.How many should you have of each kind of flower?
2.Each pack of tulips costs $4.75 and each pack of daffodils cost $3.50. From the previous problem, you know how many packs of each you will need. The sales tax is 7.5%.
a.How much tax will you be paying for all the flowers, to the nearest cent?
b.How much total will you be paying for all flowers, to the nearest cent?
3.You remember that you have a discount coupon for $2.75 off your total purchase before tax.
a. How much did the flowers cost with the discount including tax (Round to the nearest penny)?
b.How much money did you save with the coupon including tax?
Answer:
1a. 3 packs of tulips, 2 packs of daffodils
1b. 18 flowers
2a. tax: $1.59
2b. total cost: $22.84
3a. with coupon cost: $19.89
3b. $2.95 savings
Step-by-step explanation:
You want the least number of flowers and the number of packs you must purchase to have the same number of tulips and daffodils when tulips come in a 6-pack for $4.75 and daffodils come in a 9-pack for $3.50. You also want the amount of tax at 7.5%, the with-tax cost after a $2.75 discount coupon, and the total savings (with tax) that the coupon gives.
1b. FlowersThe least common multiple of 6 and 9 is (6·9)/3 = 18. This is the number of flowers of each kind you will have.
You will have 18 of each kind of flower.
1a. PacksAt 6 per pack, you will need 18/6 = 3 packs of tulips.
At 9 per pack, you will need 18/9 = 2 packs of daffodils.
You need to buy 3 packs of tulips and 2 packs of daffodils.
2a. TaxThe tax on the purchase will be the product of the tax rate and the total amount of the purchase. That total amount is sum of the product of the number of packs and the cost per pack for each of the types of flowers.
tax = 7.5% × (3×$4.75 +2×$3.50) = $1.59
2b. TotalThe total cost of the flowers is ...
(3×$4.75 +2×$3.50) × (1 +0.075) = $22.84
3a. DiscountedWhen a discount coupon is applied, the total cost is ...
(3×$4.75 +2×$3.50 - $2.75) × (1 +0.075) = $19.89
3b. SavingsThe savings with the coupon is ...
$22.84 -19.89 = $2.95
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Additional comment
You can figure the individual costs and add them up, or you can simply tell the calculator to do all that. We have elected to write the computations using a minimum number of calculator entries. In some cases, intermediate results are required for answering parts of the question.
In the least common multiple (LCM) calculation above, we have computed it as the product of the numbers, divided by their greatest common factor (3).
The "dot product" of lists {a, b} and {c, d} is ac +bd. It actually takes more keystrokes to write the sum of products using the DotP function.
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