My brain has gone blank and I forgot how to do these

She invested $1000 at 2% and 2200 at 5% simple interest.

We know simple interest (SI) is given by SI = (p×r×t)/100, where

p = principle, r = rate in percentage, and t = time in years.

Given, P₁ = 1000, P₂ = 2200, assuming r₁ = x% and r₂ = (x + 3)% and the sum of simple interest obtained from both these investments is $130.

∴ (1000×x×1)/100 + {(2200×(x + 3)×1}/100 = 130.

10x + 22x + 66 = 130.

32x = 64.

x = 2.

So, the rate of interest is 2% and 5%.

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If the rotation is clockwise the angle is 120°.

If the rotation is counterclockwise the angle is 240°

The correct options are A and D.

We assume that the rotation is clockwise.

First, we can see that the rotation from P to F is just a rotation of 90°.

(point P as at 9 on a clock and point F is at 12 on a clock).

To go from point F to G, we need to move one of the sections defined by the dashed lines, and we know that each one of these measures 30°, then we need to add another 30° to the angle.

90° + 30° = 120°

Then the angle of rotation to map P to G is 120°.

The correct option is D.

Then if the rotation is counterclockwise, the rotation will be of 240°.

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The break-even point under the old situation is 680000, the break-even point under the proposed situation is 806451 and the birr sales volume must be obtained under the proposed plan to make as much profit as last year is 1129032.

In economics, business, and particularly cost accounting, the break-even point is the point at which total cost and total income are equal, or "even." Although opportunity costs have been paid and capital has obtained the risk-adjusted, projected return, there is no net loss or gain, and one has "broken even."

In the given question, last year sales=  birr 100000

net profit= 8% of sales

Fixed costs= birr 170000

Estimated sales increase= 25%

Estimated net profit= birr 30000

Increase in fixed cost due to moving to low-rent warehouse= birr 30000

(a) The break-even point under the old situation (X):

   = 100,000 * a - 170,000

   =1,000,000 * 8%

   a= 25% (net profit)

   X*a= 1170,000

   X=680,000

   That is, the break-even point under the old situation is 680000.

(b) The break-even point under the proposed situation is:

      = 1,250,000 x b - 170,000- 30,000

      = 80,000 + 30,000

      b= 24.8%

      X*b=200,00

      X=806451

      The break-even point under the proposed situation is 806451 and

(c) The birr sales volume must be obtained under the proposed plan to make as much profit as last year is:

        X*b -200,000= 80,000

        X*b = 280,00

        X= 1,129,032

The birr sales volume must be obtained under the proposed plan to make as much profit as last year is 1129032.

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Answer:

[tex]\huge\boxed{\sf 48r\² + 40r}[/tex]

Step-by-step explanation:

= -4r(-15r + 3r - 10)

Add -15r and 3r

= -4r(-12r - 10)

Distribute

= (-4r)(-12r) - (-4r)(10)

= 48r² - (-40r)

[tex]\rule[225]{225}{2}[/tex]

The total distance covered is 15000 m. The total time taken is 5220 seconds and the speed is 2.87 m/s.

We know that speed has to do with the ratio of the distance that has been covered to the time taken. The speed is a scalar quantity and as such we do not consider the direction hence we would not consider that going back in the opposite direction. The total distance can be obtained algebraically.

The total distance that the student travelled can be obtained from;

5000 m + 5000 m + 5000 m

= 15000 m

The total time taken in seconds = 1800 seconds + 1800 seconds + 1620 seconds

= 5220 second

Speed = Distance/ Time

= 15000 m/5220 second

= 2.87 m/s

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Answer: 8 fields are needed

Step-by-step explanation:

65 ÷ 9 = 7.222
You can't have a partial field, so you round up to find the number of fields for all 65 cows.
8 fields will fit 65 cows

Answer: 8

Step-by-step explanation:

you divide 65 by 9 but you cant have 7.222 cows so its 8

Answer:is 1

identity property of 0 the definition is adding 0 to any number results in the number itself. and one 1 is have the same but other 3 is not.

The average rate of change is given by -2/5. The correct option is (d).

A ratio is the relation between two numbers as a / b. A proportion is the equality of two ratios as a / b = c / d.

Ratio and proportion can be applied to solve Mathematical problems dealing with unit values of the quantities.

The given graph shows different values of y at x = 4 and x = 14 as follows,

At x = 4, y = 7

And at x = 14, y = 3.

Now, the average rate of change can be determined by taking the ratio of the difference of the values of y to that of x as follows,

(3 - 7)/(14 - 4)

= -4/10

= -2/5

Hence, the average rate of change x = 4 to x = 14 is given as -2/5.

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Hence, the probability of selecting two Democrats is [tex]45[/tex].

What is the probability?

Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event.

The value is expressed from zero to one. Probability has been introduced in Maths to predict how likely events are to happen.

The meaning of probability is basically the extent to which something is likely to happen.

Here given that,

Consider a political discussion group consisting of [tex]9[/tex] ​Democrats, [tex]9[/tex] ​Republicans, and [tex]5[/tex] Independents. Suppose that two group members are randomly​ selected, in​ succession, to attend a political convention.

Let us assume ,

The discussion of the democratic is [tex]x_1=9[/tex].

The discussion of the democratic is [tex]x_2=9[/tex].

The discussion of the democratic is [tex]x_3=5[/tex]

So, the total number of candidates are

[tex]x_t=x_1+x_+x_3\\\\=9+9+5\\\\=23[/tex]

Probability of independate candidate from the group of candidates is

[tex]P_1=\frac{x_3}{x_t}\\\\P_1=\frac{5}{23}\\\\[/tex]

As, the remaining number of candidates after the selectio of the independent candidate is

[tex]x_r=x_t-1\\\\x_r=23-1\\\\x_r=22[/tex]

Now, the remaining number of candidates from the group of total remaining candidates is

[tex]P_2=\frac{x_1}{x_r}\\\\P_2=\frac{9}{22}[/tex]

So, the probability of an independent Democrat using the probability is

[tex]P=P_1[/tex] × [tex]P_2[/tex]

[tex]P=\frac{5}{23}[/tex] ×[tex]\frac{9}{22}[/tex]

[tex]P=\frac{110(207)}{506}\\\\P=\frac{22770}{506}\\\\P=45[/tex]

Hence, the probability of selecting two Democrats is [tex]45[/tex].

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Step-by-step explanation:

15 e^(4x) =12

divide both sides by 15

e^(4x) = 0.8

if e^y = X

then y = ln x

4x=ln 0.8

4x=-0.22314

dividing both sides by 4

4x/4= -0.22314/4

x = -0.0558

There are commonly used four inequalities:

Less than = <

Greater than = >

Less than and equal = ≤

Greater than and equal = ≥

The inequalities that describe the constraints on the number of each type of hedge trimmer produced are:

x + y ≤ 200

2x + 10y ≤ 1000

It shows a relationship between two numbers or two expressions.

There are commonly used four inequalities:

Less than = <

Greater than = >

Less than and equal = ≤

Greater than and equal = ≥

We have,

Total number of hours = 1000

Total number of trimmers = 200

Let x represent the number of cord-type models,

Let y represent the number of cordless models.

Now,

x + y ≤ 200

2x + 10y ≤ 1000

Thus,

The inequalities that describe the constraints on the number of each type of hedge trimmer produced are:

x + y ≤ 200

2x + 10y ≤ 1000

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Answer:

y=0.25x+3

Step-by-step explanation:

use desmos graphing calculator and put the coordinates into a table

Answer: the first one

Step-by-step explanation:

Answer:

Sydney will have to pay -5, and her brother will have to pay -7. Her brother will have to pay $2 more than Sydney.

Step-by-step explanation:

The net asset value of the given mutual fund will be 2.29.

Arithmetic operators are four basic mathematical operations in which summation, subtraction, division, and multiplication involve.,

Division = divide any two numbers or variables called division.

Multiplication = to multiply any two or more numbers or variables called multiplication.

As per the given,

Total assets = $25,500,000

Liabilities = $2,100,000

Total shares = 10,200,000

Net asset = (total assets - total liability)/total shares outstanding

Net assets = (25,500,000 - 2,100,000)/10,200,000

Net assets = 2.29

Hence "The net asset value of the given mutual fund will be 2.29".

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Answer:

Plane PQY

Step-by-step explanation:

A plane is defined by 3 non-linear points. This is because if 3 linear points are given, only a line has been defined; its plane could be at any angle. The only answer choice that has non-linear points is PQY.

Answer: 23.1, 13.35718336 years or 14 rounded

Step-by-step explanation:

[tex]Given:A= 23.1e^{0.0152t}[/tex]

when A = end amount, and t = years after 2000

Part A).

What was the population of the state in 2000. According to our function, this would be when t = 0

[tex]23.1e^{0.0152(0)}\\\\=23.1(1)\\\\=\boxed{23.1}[/tex]

Part B).

When will the population of the state reach 28.3 million?

This would be when A = 28.3

[tex]28.3=23.1e^{0.0152t}\\\\\frac{28.3}{23.1} =\frac{23.1e^{0.0152t}}{23.1} \\\\\frac{28.3}{23.1} =e^{0.0152t}\\\\ln^{\frac{28.3}{23.1} }=ln^{e^{0.0152t}}\\\\ln^{\frac{28.3}{23.1} }=0.0152t\\\\t=\frac{ln^{\frac{28.3}{23.1} }}{0.0152} \\\\\boxed{t=13.35718336 \ \ years}[/tex]

The correlation coefficient between Exam 1 scores and Exam 2 scores is given as follows:

0.8452.

The equation for this problem is given as follows:

b = r x Sy/Sx.

The variables of the equation are given as follows:

The input and the output variables in this problem are given as follows:

Hence the values of the parameters are given as follows:

b = 0.51, Sx = 11.6, Sy = 7.

Hence the numeric value of the correlation coefficient is obtained as follows:

b = r x Sy/Sx.

r x 7/11.6 = 0.51

0.6034r = 0.51

r = 0.51/0.6034

r = 0.8452.

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Answer:

ten is the fight one

Step-by-step explanation:

True

Answer:

39%

Step-by-step explanation:

126.28 minus 77 is 49.28.

49.28 divided by 126.28 is 0.39 and a bunch of other numbers but round it up and its 0.39. move the decimal to the right two places and youve got 39%

hope this helped!

Answer:

283 cm^2

Step-by-step explanation:

hi your welcome

Answer:

Step-by-step explanation:

radius = r = 17

height = h = 13

First calculate the total surface area =

2πr (r + h)

2 (3.14) 17 (17 + 13)

2 (3.14) 17 (30)

6.28 (17)(30)

106.76 (30)

3202.80  cm²

Then subtract the area of the bottom base of the cake:

Base of the cake is the area of the round base

π r² = 3.14 (17)²

3.14 (289) = 907.46 cm²

Subtract area of base from total surface area:

I am rounding:

3203 - 908 = 2295 cm²

Second option or B

The sum of the arithmetic sequence 1, 3, 5, 7, … , 99 is 2525

Sequence is an enumerated collection of objects in which repetitions are allowed and order matters.

Given sequence is 1, 3, 5, 7, … , 99.

It is a arithmetic sequence, the difference between two consecutive terms will be same

d=3-1=2

first term a=1

l=last term =99

We need to find 99 is which term in the sequence

Aₙ = a + ( n - 1 ) d

99=1+(n-1)2

99=1+2n-2

99=2n-1

100=2n

Divide both sides by 2

50=n

Now we need to find the sum of 50 terms

Sₙ=n/2(l+d)

=50/2(99+2)

=25(101)

=2525

Hence, the sum of the arithmetic sequence 1, 3, 5, 7, … , 99 is 2525

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Using the secant-secant theorem,

[tex]\frac{13x+7-60}{2}=5x-10 \\ \\ 13x-53=10x-20 \\ \\ 3x-53=-20 \\ \\ 3x=33 \\ \\ \boxed{x=11} \\ \\ m\angle RDB=5(11)-10=\boxed{45^{\circ}}[/tex]

The measure of the angle ∠RDB will be 45°.

In geometry, a chord of a circle is a straight line segment whose endpoints both lie on the circle. A diameter of a circle is the longest chord, and it passes through the centre of the circle.

Calculate the value of x as below,

( 13x + 7 - 60 ) / 2 = 5x - 10

13x - 53 = 10x - 20

3x - 53 = -20

3x = 33

x = 11

The measure of the angle ∠RDB is,

∠RDB = 5x - 10

∠RDB = ( 5 x 11 ) - 10

∠RDB = 45°

Therefore, the value of an angle ∠RDB will be 45°.

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The number of ways that 7 new members be chosen if 2 or fewer must be from the Senior class is; 705 ways

The formula for probability combination is;

nCr = n!/(r! * (n – r)!)

where;

n is the total number of items.

r is the number of things that may be selected at one time.

The number of ways that 2 students can be selected from the senior class is;

N(2 students from the SR class) = 3C2 * 10C2 = 135 ways

Similarly;

N(1 student from the SR class) = 3C1 * 10C3 = 360

N(0 students from the SR class) = 3C0 * 10C4 = 210

Thus, number of ways that 7 new members be chosen if 2 or fewer must be from the Senior class is;

135 + 360 + 210 = 705 ways

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The volume of the canister is 36.7 in³. The volume of box is 482.6 cm³

To find the volume of a canister, we can use the formula V = πr²h, where V is the volume, r is the radius, and h is the height.

In this case, the canister has a radius of 1.56 inches and a height of 6.93 inches,

volume of canister = π × (1.56 inches)² × 6.93 inches

volume of canister = 36.7 in³

To find the volume of a box, we can use the formula V = lwh, where V is the volume, l is the length, w is the width, and h is the height.

In this case, the box has a length of 15.5 cm, a width of 8.6 cm, and a height of 3.8 cm

volume of box = 15.5 cm × 8.6 cm × 3.8 cm

volume of box = 482.6 cm³

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The statement that best describes the functions represented in the graphs is B. Only function p is continuous and linear.

A linear function consists of functions where the variables has exponents of 1.

The graph of linear functions is a straight line graph and the relationship is expressed in the form.

y = mx + c

A function at a place can only be continuous if it is defined there, has a limit there, and its value at that point is equal to the value of the limit there.

The graph of function p is linear and continuous

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The solution for x in the inequality is x ≥ 343

From the question, we have the following inequality expression that can be used in our computation:

412≤1.2x

Divide both sides of the inequality by 1.2

So, we have

412/1.2 ≤ 1.2x/1.2

Evaluate the quotients

343 ≤ x

Rewrite the expression as

x ≥ 343

Hence, the solution is x ≥ 343

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Answer:

1

Step-by-step explanation:

[tex]f(2)[/tex] is equal to the [tex]y[/tex] coordinate of the point on the graph of the function with [tex]x[/tex] coordinate 2.

Answer: There are multiple answers.

Step-by-step explanation: To find x...simply ad together what you have (The numbers given) and subtract from 180.

(I did this a while ago, don't take my word  for it)

For the function y = 4x⁵, the value of d⁴y/dx⁴ = 320x.

A mathematical expression is made up of terms (constants and variables) separated by mathematical operators. A mathematical equation is used to equate two expressions. Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem. In mathematics, the derivative of a function of a real variable measures the sensitivity to change of the function value with respect to a change in its argument. We can write -

y = f(x)

y' = dy/dx = (d/dx)[f(x)]

We have the following function -

y = 4x⁵

The given function is -

y = 4x⁵

dy/dx = 20x⁴                             {y = xⁿ, then y' = nxⁿ ⁻ ¹}

d²y/dx² = 80x³

d³y/dx³ = 160x²

d⁴y/dx⁴ = 320x

Therefore, for the function y = 4x⁵, the value of d⁴y/dx⁴ = 320x.

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Answer:[tex]26\frac{7}{12}[/tex]

Step-by-step explanation:

2 1/5 * 12 1/2 = 319/12

319/12 = [tex]26\frac{7}{12}[/tex]