Answer:
The answer is not D it's A
Step-by-step explanation:
I just took the test
2x2 – 8x = 10
Complete the square
Answer:
this equation has no solution
Step-by-step explanation:
Solve the formula A=law for l
Answer:
l = A/aw
Step-by-step explanation:
Since we want the equation in terms of l, we simply isolate the l by dividing both sides by aw:
A = law
A/aw = law/aw
A/aw = l
In Las Vegas, the hottest recorded temperature is 47°C, and the lowest recorded temperature is -13°C. What is the difference between the city's highest and lowest recorded temperatures?
The difference between the citys highest and lowest recorded temperatures is 60°.
Find a rational number halfway between 7/8 and 6/7
================================================
How to get this answer:
Midpoint formula: (A+B)/2 = C
A and B are the endpoints with C as the midpoint
A = 7/8
B = 6/7
A+B = 7/8 + 6/7
A+B = 49/56 + 48/56
A+B = (49+48)/56
A+B = 97/56
(A+B)/2 = (97/56) divided by 2
(A+B)/2 = (97/56) times (1/2)
(A+B)/2 = (97*1)/(56*2)
(A+B)/2 = 97/112
Please answer this correctly
Answer:
100%
Step-by-step explanation:
The numbers odd or less than 7 are 5, 6, and 7.
3 numbers out of 3.
3/3 = 1
P(odd or less than 7) = 100%
To turn 2/5 into a decimal what operation must you preform
Answer:
2/5 =0.4
Step-by-step explanation:
Decimals are one of the method of representation of fractions in which there is power of 10 in the denominator of the fraction. They are 10,100,1000,10,000 ,100,0000 and so
Example = 1/10 = 0.1
1/100 = 0.01
1/1000 = 0.001
In 2/5 we have to make the denominator 10
since in denominator there is five , can be made 10 by multiplying it by 2
2/2 = 1 and 1* x = x , hence if we multiply numerator and denominator by 2 it won't change the fraction.
2/5×2/2=2×2/5×2=4/10=0.4
Thus, 2/5 =0.4 in decimal form.
Assume that when adults with smartphones are randomly selected, 5656% use them in meetings or classes. If 1212 adult smartphone users are randomly selected, find the probability that fewer than 55 of them use their smartphones in meetings or classes.
Answer:
9.88% probability that fewer than 5 of them use their smartphones in meetings or classes.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they use their smartphone is meetings or classes, or they do not. The probability of an adult using their phones is independent of other adults. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
56% use them in meetings or classes.
This means that [tex]p = 0.56[/tex]
12 adult smartphone users are randomly selected
This means that [tex]n = 12[/tex]
Probability that fewer than 5 of them use their smartphones in meetings or classes.
[tex]P(X < 5) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)[/tex]
In which
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 0) = C_{12,0}.(0.56)^{0}.(0.44)^{12} = 0.0001[/tex]
[tex]P(X = 1) = C_{12,1}.(0.56)^{1}.(0.44)^{11} = 0.0008[/tex]
[tex]P(X = 2) = C_{12,2}.(0.56)^{2}.(0.44)^{10} = 0.0056[/tex]
[tex]P(X = 3) = C_{12,3}.(0.56)^{3}.(0.44)^{9} = 0.0239[/tex]
[tex]P(X = 4) = C_{12,4}.(0.56)^{4}.(0.44)^{8} = 0.0684[/tex]
[tex]P(X < 5) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) = 0.0001 + 0.0008 + 0.0056 + 0.0239 + 0.0684 = 0.0988[/tex]
9.88% probability that fewer than 5 of them use their smartphones in meetings or classes.
I NEED HELP PLEASE, THANKS! :)
Find the sum of the first 5 terms of the geometric series. 8 – 16 + 32 – ... 87
86
88
89
Answer: c) 88
Step-by-step explanation:
8, -16, 32, ...
We can see that each previous term is multiplied by -2
so the next two terms will be 32(-2) = -64 and -64(-2) = 128
So the first 5 terms of the sequence is: 8, -16, 32, -64, 128
Add the positive numbers and the negative numbers, then find their sum.
8 + 32 + 128 = 168
-16 + (-64) = -80
Sum = 88
I need help on a question real quick
Answer:
4x-3y
Step-by-step explanation:
Given: y varies directly with x and has a constant rate of change of 7.
When the value of y is 12, then the value of xwould be
Answer:
12/7
Step-by-step explanation:
y=7x
y=12 ⇒ 7x= 12 ⇒ x= 12/7
Triangle A B C is shown. Angle B C A is a right angle. The length of hypotenuse A B is 5, the length of B C is 3, and the length of A C is 4. What is the length of the side opposite Angle B? 3 units 4 units 5 units 6 units
The side opposite to angle B is the side that does not contact with angle B.
In this attached image, you can see better that sides AB and BC is in contact with angle B. So, the opposite side to angle B is AC.
Therefore, the lenght of the side opposite to angle B is 4 units.
Answer:
B 4Units
Step-by-step explanation:
Edg 2020 or maybe 2022
what is the median price of rent for the university of oregon
Answer:
$11,450
Step-by-step explanation:
thats the median price according to Google
Claim: Most adults would erase all of their personal information online if they could.A software firm survey of 453 randomly selected adults showed that 60% of them would erase all of their personal information online if they could. Find the value of the test statistic. (Round to two decimal places as needed.)
Answer:
The value of the test statistic is 4.26.
Step-by-step explanation:
In this case a hypothesis test is performed to determine whether most adults would erase all of their personal information online if they could.
A random sample of n = 453 adults were selected and it was found that 60% of them would erase all of their personal information online if they could.
Assume that the population proportion is, p = 0.50.
A z-test for single proportion would to used to perform the test.
Compute the value of the test statistic as follows:
[tex]z=\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n}}}[/tex]
[tex]=\frac{0.60-0.50}{\sqrt{\frac{0.50(1-0.50)}{453}}}\\\\=\frac{0.10}{0.0235}\\\\=4.25532\\\\\approx 4.26[/tex]
Thus, the value of the test statistic is 4.26.
Solve for k. -21 -3 21
Answer:
k = -21
Step-by-step explanation:
9/ (2k-3) = 4/(k+1)
Using cross products
9 * (k+1) = 4(2k-3)
Distribute
9k+9 = 8k -12
Subtract 8k from each side
9k-8k +9 = 8k-8k-12
k+9 = -12
Subtract 9 from each side
k+9-9 = -12-9
k = -21
Answer:
[tex]\huge\boxed{k=21}[/tex]
Step-by-step explanation:
[tex]\dfrac{9}{2k-3}=\dfrac{4}{k+1}[/tex]
First step:
Find domain.
We know: the denominator must be different than 0.
Therefore we have:
[tex]2k-3\neq0\ \wedge\ k+1[/tex]
[tex]2k-3\neq0\qquad\text{add 3 to both sides}\\2k\neq3\qquad\text{divide both sides by 2}\\\boxed{k\neq1.5}\\\\k+1\neq0\qquad\text{subtract 1 from both sides}\\\boxed{k\neq-1}\\\\\text{Domain:}\ x\in\mathbb{R}\backslash\{-1;\ 1.5\}[/tex]
Second step:
Solve for k.
[tex]\dfrac{9}{2k-3}=\dfrac{4}{k+1}\qquad\text{cross multiply}\\\\9(k+1)=4(2k-3)\qquad\text{use the distributive property}:\ a(b+c)=ab+ac\\\\(9)(k)+(9)(1)=(4)(2k)-(4)(3)\\\\9k+9=8k-12\qquad\text{subtract 9 from both sides}\\\\9k=8k-21\qquad\text{subtract}\ 8k\ \text{from both sides}\\\\\boxed{k=21}\in\text{Domain}[/tex]
I needed help with question #29. Thank you. Sorry the picture is a bit blurry.
Answer:
1.3 in
Step-by-step explanation:
If 0.75 is 0.55 less than the average amount, the answer must be 0.75 + 0.55 = 1.3 inches.
Answer:
1.3 in
Step-by-step explanation:
Which function is negative for the interval [-1,1] ?
Answer:
Option (2)
Step-by-step explanation:
Option (1)
In the interval [-1, 1] Or -1 ≤ x ≤ 1, value of the function will be represented by the y-values.
Since, the graph is below x-axis in the interval -1 ≤ x ≤ 0.5, function will be negative.
And in the interval 0.5 ≤ x ≤ 1, graph is above the x-axis, function will be positive.
Option (2)
In this option, graph is below the x-axis in the interval [-1, 1].
Therefore, the given graph is negative in this interval.
Option (3)
In this graph, function is negative and positive both in the interval -1 ≤ x ≤ 1.
Option (4)
In this graph function is completely above the x-axis in the interval -1 ≤ x ≤ 1.
So this function is positive in the interval [-1, 1].
Therefore, Option (2) will be the answer.
Answer:b since I got the others wrong
which of the following in order from the least to the greatest?
.321,.33,.4
.598,.409,.554
.289,.305,.301
.701,.698,.811
Answer:
.321,.33,.4
Step-by-step explanation:
the point is like negative it decreases with
the big number is consider the smallest with the point while without the point the big number remains
Laura tiene las tres séptimas partes de la edad de su mamá dentro de 5 años la edad de su mamá será el doble que la edad de ella ¿Cuántos años tiene cada una?
Answer:
Laura tiene 15 años mientras que su madre tiene 35 años.
Step-by-step explanation:
Deje que la edad de Laura sea L.
Deje que la edad de su madre sea m.
Tiene 3/7 de la edad de su madre:
L = 3 m / 7
En 5 años, la edad de su madre será el doble de su edad:
(m + 5) = 2 (L + 5)
m + 5 = 2L + 10
m - 2L = 5
Pon el valor de L:
m - 2 (3 m / 7) = 5
m - 6 m / 7 = 5
Multiplica por 7:
7m - 6m = 35
m = 35 años
=> L = 3 * 35/7 = 15 años
Laura tiene 15 años mientras que su madre tiene 35 años.
Do the table and the equation represent the same function ? Y=390+11(x)
Not exactly
The values of the table are determined by the equation
What is the inverse of f(x)=3x-2/6 ?
You are told that one of the internal angles of a parallelogram is 54 degrees. This means at least one other angle must be equal to
Answer:
54 degrees
Step-by-step explanation:
The opposite angles in a parallelogram are equal.
At least one other angle must be equal to 54°.
Given that, you are told that one of the internal angles of a parallelogram is 54°.
What are the properties of a parallelogram?A parallelogram is a type of quadrilateral in which the opposite sides are parallel and equal. There are four angles in a parallelogram at the vertices. Understanding the properties of parallelograms helps to easily relate their angles and sides. Also, the properties are helpful for calculations in problems relating to the sides and angles of a parallelogram.
The four important properties of parallelogram angles and sides are as follows:
The opposite sides of a parallelogram are equal and parallel to each other.
Opposite angles are equal, i.e ∠A = ∠C, and ∠B = ∠D.
All the angles of a parallelogram add up to 360°, i.e. ∠A + ∠B + ∠C + ∠D = 360°.
The consecutive angles of a parallelogram are supplementary, i.e.,
∠A + ∠B = 180°
∠B + ∠C = 180°
∠C + ∠D = 180°
∠D + ∠A = 180°
Now, since opposite angles are equal, then the other angle must be equal to 54°.
Therefore, at least one other angle must be equal to 54°.
To learn more about the angles of parallelogram visit:
https://brainly.com/question/25999877.
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find the sum of these polynomials. (5x^2-4x+2)+(3x^2+9x-8)=? A. 8x^2-5x+10 B. 8x^2+5x-6 C. 8x^2-5x-6 D. 8x^2+5x+10
Answer:
B: 8x^2+5x-6
Step-by-step explanation:
The SAT and ACT exams are often used to predict a student's first-term college grade point average (GPA). Different formulas are used for different colleges and majors. Suppose that a student is applying to a university with an intended major in civil engineering. Also suppose that for this college and this major, the following model is used to predict first term GPA.
GPA= a+ b(ACT)
a= 0.4
b= 0.3
Requried:
a. In this context, what would be the appropriate interpretation of the value of a?
b. In this context, what would be the appropriate interpretation of the value of b?
Answer:
In this example it seems that "a" is a fixed value that is added to adjust the scale value. . It seems that "b" is a factor that adjust the value of the ACT score as a predictor for success in the chosen field of study.
Step-by-step explanation: The scores from the SAT and ACT are not in the same format as GPA. So the scale needs adjustment. Also the tests measure different knowledge and skills. They may be more or less reliable as predictors of success in a given field of study, so the "b" factor would change for different majors.
Based on the context ;
a = lowest GPA value a student can according to the model.
b = change in GPA value per unit change in ACT score.
The given relationship between GPA and ACT Score is a simple linear regression model in the form :
y = bx + c
Where ; y = Predicted value ; b = slope or gradient ; c = intercept
GPA prediction model:
GPA = a + b(ACT)
Comparing the general linear regression model with the GPA model given :
b = slope = change in y per unit change in x;
• Based on the context, this means ;Change in GPA value per unit change in ACT Score
a = intercept = value of y when x = 0;
• Based on the context, a is the lowest GPA value a student can have. (even if such student has an ACT Score of 0).
Learn more : https://brainly.com/question/23182693
Mindy is 36 years old. Mindy's age is 3 years older than two times Jake's age. Let j represent Jake's age.
Answer:
36 = 2j + 3
This should be the correct answer to your question
PLease rate and mark brainliac if this helped
A shape drawn on a square grid. more than one of the words listed can describe the shape select the words that can describe
Answer:
A and D
Step-by-step explanation:
Quadrilateral is a four sided figure
Parallelogram is a quadrilateral with two pairs of parallel sides
The total number of students enrolled in MATH 123 this semester is 5,780. If it
increases by 0.35% for the next semester, what will be the enrollment next
semester? Round to a whole person.
Answer:
5,800 people
Step-by-step explanation:
We can find the enrollment for next semester by multiplying:
5,780(1.0035) = 5,800.23
We can round this to 5,800 people.
Find the indicated limit. ModifyingBelow lim With x right arrow 8 StartRoot 7 x minus 2 EndRoot Select the correct choice below and fill in the answer box within your choice. A. ModifyingBelow lim With x right arrow 8 StartRoot 7 x minus 2 EndRoot = nothing (Type an exact answer, using radicals as needed.) B. The limit does not exist.
Answer:
[tex]3\sqrt{6}[/tex]
Step-by-step explanation:
We are to determine the limit below.
[tex]\lim _{x \rightarrow8}\sqrt{7x-2}[/tex]
Plug in 8 into the function.
[tex]\lim _{x \rightarrow8}\sqrt{7x-2}=\sqrt{7(8)-2}\\=\sqrt{56-2}\\ =\sqrt{54}\\ =3\sqrt{6} \\\lim _{x \rightarrow8}\sqrt{7x-2}=3\sqrt{6}[/tex]
Which of the binomials below is a factor of this trinomial?
x² + 3x - 4
Answer:
(x+4) or (x-1)
Step-by-step explanation:
Do this by factoring out your equation. To do this, think about which two numbers multiply to be -4 but also add up to be 3 (the -4 came from multiplying the first value (the 1 that is attached to the [tex]x^{2}[/tex]) and the last value, which is -4. The 3 came from the middle term).
The two numbers you should have gotten are 4 and -1. Therefore, (x+4) and (x-1) are both of the binomials that could be your answer
Use the Factor Theorem to determine if x – 2 is a factor of g(x) = 2³ − 5x²+x+2
Answer:
(x -2) is a factor
Step-by-step explanation:
The factor theorem tells you that (x-2) is a factor of g(x) if g(2) = 0.
g(2) = 2·2³ -5·2² +2 +2 = 16 -20 +2 +2 = 0
Since g(2) = 0, (x -2) is a factor of g(x).
__
The graph shows us the complete factorization is ...
g(x) = (2x +1)(x -1)(x -2)
Find the volume. Round to the nearest hundredth if necessary.
9 yd
4 yd
2 yd
3 yd
7 yd
O 32 yd
O 22 yd
48 yd
29 yd
36 yd
Answer:
36 yd³
Step-by-step explanation:
The above solid shape given is a triangular prism.
The volume of triangular prism is given as ½ × base length of the triangle (b) × height of the triangle (h) × the length of the prism (l)
Base length of triangle (b) = 9 yd
Height of the triangle (h) = 2 yd
Length of the prism (l) = 4 yd
Volume = ½bhl
Volume = ½*9*2*4
Volume = 9*4
Volume of prism = 36 yd³