All categories

3 years ago

What is the value of -7(x²-6)+2y when x=2 and y=-6? OB) 0 OC) 1 OD 2 N hurry

Mathematics

1 answer:

mote1985 [20]3 years ago

6 0

Answer:

Step-by-step explanation:

Fill in the x and y with the values you are trying to find.

-7(2^2 -6)+2(-6)

distribute the -7 and 2 into the parenthesis after squaring the 2.

(-28+42)-12

simplify

14-12

OD) 2

I hope this helps

You might be interested in

HELP ME PLEASE!!!!!!!!!!!!!!!!!!!! IM TIMED!!!

Sonja [21]

Since the angle is a straight line 180 degrees then 180-134=46

X=46 degrees

7 0

3 years ago

Suppose that an internal report submitted to the managers at a bank in Boston showed that with 95 percent confidence, the propor

Dmitry [639]

Answer:

The sample size used to compute the 95% confidence interval is 1066.

Step-by-step explanation:

The (1 - α)% confidence interval for population proportion is:

$CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

The 95% confidence interval for proportion of the bank's customers who also have accounts at one or more other banks is (0.45, 0.51).

To compute the sample size used we first need to compute the sample proportion value.

The value of sample proportion is:

$\hat p=\frac{Upper\ limit+Lower\ limit}{2}=\frac{0.45+0.51}{2}=0.48$

Now compute the value of margin of error as follows:

$MOE=\frac{Upper\ limit-Lower\ limit}{2}=\frac{0.51-0.45}{2}=0.03$

The critical value of z for 95% confidence level is:

$z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

Compute the value of sample size as follows:

$MOE=z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\0.03=1.96\times \sqrt{\frac{0.48(1-0.48)}{n}}\\(\frac{0.03}{1.96})^{2}=\frac{0.48(1-0.48)}{n}\\n=1065.404\\n\approx1066$

Thus, the sample size used to compute the 95% confidence interval is 1066.

4 0

3 years ago

There are 149 people in Jared’s class. Jared buys erasers for each of them. Erasers are sold 4 to a pack. How many packages of e

Oduvanchick [21]

Approximately 37 packs should do

6 0

3 years ago

Read 2 more answers

What can you tell about a triangle when given three side lengths?

Whitepunk [10]

Answer:

All you have to do is use the Triangle Inequality Theorem, which states that the sum of two side lengths of a triangle is always greater than the third side. If this is true for all three combinations of added side lengths, then you will have a triangle.

Step-by-step explanation:

4 0

3 years ago

One angle of an isosceles triangle is 80º. What are the other two angles?

eimsori [14]

Answer:

80 and 20

Step-by-step explanation:

80+80+20=180

4 0

3 years ago