I forgot to post the actual question LOL my points :')

SIMPLIFY the expression, don't solve it! Explain too please!

Answer: E

Step-by-step explanation:

To cancel out the Y you need to have both multiplied by each other

so the first equation get multiplied by 7 and the second one by 4

28y + -28y = 0 they cancel out

Answer:

is 3

Step-by-step explanation:

(example every time they give n=6 or q=10... you always have to multiply)

if p=5

3 x 5 - 12 = 3

and here how you solve

(3)(5)−12

=15−12

=3

Answer:

288

Step-by-step explanation:

expand by distributing

2x-8+5x+15

combine like terms to simplify

7x+7

Answer:

6x - 45

Step-by-step explanation:

Answer:

18yi+ 21y^2

Step-by-step explanation:

answer 18 yi+21y2

step by step

Answer:

Answer Expert Verified To factor a quadratic of the form ax^2+bx+c, two values, j and k, must satisfy two conditions... The greater of which is 5.

Answer:

4

Step-by-step explanation:

Answer:

3x-8

Step-by-step explanation:

Answer:

If the question has

What are the mean and standard deviation of the sampling distribution of the difference in sample means x¯F−x¯M ?

It is E

Step-by-step explanation:

AP classroom uses the example with different end questions.

The mean and standard deviation of the sampling distribution of the difference in sample means xF − xM is 1.5 minutes(mean) and 1.533 minutes(std. dev) approx The probability of getting a difference in sample means xF − xM that is less than 0 is 0.0239 approx.

Suppose that a random variable X is formed by n mutually independent and normally distributed random variables such that:

[tex]X_i = N(\mu_i , \sigma^2_i) ; \: i = 1,2, \cdots, n[/tex]

And if

[tex]X = X_1 + X_2 + \cdots + X_n[/tex]

Then, its distribution is given as:

[tex]X \sim N(\mu_1 + \mu_2 + \cdots + \mu_n, \: \: \sigma^2_1 + \sigma^2_2 + \cdots + \sigma^2_n)[/tex]

For this case, it is given that:

Estimated sample mean  = population mean

Estimated sample standard deviation = population std. dev / √n

where n = sample size

Thus, we get:

For sample of females, the distribution is [tex]X_F \sim N(\overline{x}_F = 8.8, s_F = 3.3/\sqrt{8})[/tex]
For sample of males, the distribution is [tex]X_M \sim N(\overline{x}_M =7.3, s_M = 2.9/\sqrt{8})[/tex]

Also, if we take distribution of difference between sample means([tex]X_F - X_M = X_F + (-X_M)[/tex], then it would be normal with mean = 8.8-7.3 = 1.5 minutes (as mean for [tex]-X_F[/tex] will be -7.3 but same standard deviation) as factor gets squared for affecting standard deviation and variance)

and standard deviation is: [tex]s = \sqrt{s_F^2 + s_M^2} = \sqrt{3.3^2/8 + 2.9^2/8} \approx 1.553 \: \rm minutes[/tex]

The distribution of difference between sample means is [tex]X_F - X_M \sim N(\overline{x} = 1.5, s = 1.533)[/tex] approximately

We need [tex]P(X_F - X_M < 0)[/tex]

Converting this distribution to standard normal distribution, we get:

[tex]P(X_F - X_M < 0) = P(Z < \dfrac{0 - \overline{x}}{s} \approx -1.98)[/tex]

From the z-tables, we get the p value for Z = -1.98 as 0.0239

Thus, we get:

[tex]P(X_F - X_M < 0) = P(Z < \dfrac{0 - \overline{x}}{s} \approx -1.98) \approx 0.0239[/tex]

Thus, the mean and standard deviation of the sampling distribution of the difference in sample means xF − xM is 1.5 minutes(mean) and 1.533 minutes(std. dev) approx The probability of getting a difference in sample means xF − xM that is less than 0 is 0.0239 approx.

Learn more about standard normal distribution here:

https://brainly.com/question/10984889

Answer:

m<A = 120°

m<C = 45°

Step-by-step explanation:

We can use the triangle sum theorem to find the measures of the angles.

m<A + m<B + m<C = 180°

Then substitute in their given values.

12x + 12 + 15 + 3x + 18 = 180°

Now simplify the equation and you get

15x + 45 = 180°

Continue to solve

15x = 135

x = 9°

Now substitute this value of 9 for the angle expressions of <A and <C

(12 x 9) +12 = m<A

m<A = 120°

(3 x 9)+ 18 = m<C

m<C = 45°

Hope this helps. To check your answer you can add up all the answers to see if it equals 180°.

Jama works for ABC, pays 1/5 of his social service salary, 1/10 of his rent, 3/5 of his children's education with $ 1800 left, and attends night classes at university and earns $ 500.

produce all his wages?

Answer:

B

Step-by-step explanation:

Answer:

$62.bope this helpsjensbdnd

Answer:13.8

Step-by-step explanation:

Answer:

As the ratio of the length of the arm of the old chair to the length of the arm of the new chair is 3/2, and the length of the old chair is 9 inches, hence the length of the arm of the new chair is 6 inches.

Answer:

x-intercept (-14/9, 0), y-intercept (0, -14)

Step-by-step explanation:

0=-9x-14

9x=-14

x=-14/9

y=-9(0)-14

y=-14

Step-by-step explanation:

1.55 I was help to you..........

Answer:

f(-3)= -4

Step-by-step explanation:

Given function in the question is,

f(x) = 3x + 5

Here, values of 'x' are the input values of the function.

And the values of the function f(x) by substituting the values of 'x' are the output values.

If the output value of the function 'f' is -3,

-3 = 3x + 5

3x = -3 - 5

x = [tex]-\frac{8}{3}[/tex]

Therefore, for the input value x = [tex]-\frac{8}{3}[/tex], output value of the function will be f(x) = -3.

Learn more,

https://brainly.com/question/12777739

Answer:

for diamond A: -3.6 on top, -3 on left

for diamond B: -2 on left, 6 on right

for diamond C: 24 on top, -3 on right

Step-by-step explanation:

Answer:

Sorry but you aren't posting your answer again

Step-by-step explanation:

Answer:

n,n

I think

Step-by-step explanation:

Answer:

n,n

Step-by-step explanation:

Answer: (0,-7)

HOPE I HELPED

Step-by-step explanation:

Answer:

-7

Step-by-step explanation:

Since you are trying to solve for y, you set all the x values to 0.

(Y intercept occurs when x = 0, thats why you sub 0 for all x)

y= -4(0)^2[tex]y=-4(0)^{2} +5(0) -7[/tex]

this simplifies to

y=-7

Answer:

Step-by-step explanation:

Exact Form:

w

=

11/3

Decimal Form:

w

=

3.6 (6 is repeated)

Mixed Number Form:

w

=

3 2/3

Answer:

0.375

Step-by-step explanation:

3/8 = 0.375

Answer:

0.375

Step-by-step explanation:

Answer: (a). M=7x180+39+700. (B) $731

Step-by-step explanation:

Equation to represent the given situation is 7(19.70 + 1.97 + m X 0.05) = 180.39; additional minutes, on average, you use each month is 82

A linear equation is an algebraic equation of the form y=mx+b. involving only a constant and a first-order (linear) term, where m is the slope and b is the y-intercept.

Given that;

Total cost for 7 month =$180.39

Let m be the average number of minutes  that exceeds 700 minutes every month

Equation formed;

7(19.70 + 1.97 + m X 0.05) = 180.39,

or,  7(19.70 + 1.97 + m X 0.05) = 180.39,

or, 21.67 + 0.05m = 180.39/ 7,

or, 0.05m = 25.77 – 21.67,

0.05m = 4.1

m= 82

Therefore,  equation for (a) : 7(19.70 + 1.97 + m X 0.05) = 180.39 and 82 will be the answer of (b)

Learn more about linear equations here;

brainly.com/question/15101949

#SPJ2

After substitution in the first equation :

7x + x +21 = -19

= 8x + 21 = -19

by subtracting 21 :

8x = -19 - 21

8x = -40

by dividing over 8 :

x = -5

after substitution in the second equation :

2y = -5 + 21

2y = 16

by dividing over 2 :

y = 8

pls give me brainliest

The true statements about the graph are as follows;

Given

The graphs of y = 4x - 2 and y = 2x – 6.

A  system of equations, also known as a set of simultaneous or an equation systems, is a finite set of equations for which we sought the common solutions.

To solve the graphs subtract equation 1 from equation 2.

[tex]\rm y-y=4x-2-2x+6\\\\0=2x+44\\\\2x=-4\\\\x=\dfrac{-4}{2}\\\\x=-2[/tex]

Substitute the value of x in equation 1

[tex]\rm y=4x-2\\\\y=4(-2)-2\\\\y=-8-2\\\\y=-10[/tex]

The point (-2.-10) is the only solution.

The true statements about the graph are as follows;

To know more about the system of equations click the link given below.

https://brainly.com/question/12895249

Answer:

The answer is 3 + p × 7.....

.