All categories

3 years ago

Solve each equation: -5(7-8x)-7x=-(3x+1)

Mathematics

1 answer:

7nadin3 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

You might be interested in

Angles of XYZ and ABC are the blank because the triangle are blank and corresponding angles are blank.

Jobisdone [24]

Answer:

the answer is your teacher just wanted to draw a triangle and get paid for it.

4 0

3 years ago

Out of the 60 students on a school trip, 70 percent brought there lunch, and the rest brought money to buy lunch. How many stude

Fittoniya [83]

Answer:

18 were buying lunch:)

7 0

3 years ago

Read 2 more answers

Help what's 1x1+9x20

zzz [600]

Answer:

The answer is 181

Step-by-step explanation:

PEDMAS

1 x 1 + 9 x 20

1 x 1 = 1

1 + 9 x 20

9 x 20= 180

1+180

which equals 181

5 0

3 years ago

Read 2 more answers

A public health official is planning for the supplyof influenza vaccine needed for the upcoming flu season. She wants to estimat

Marizza181 [45]

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.64})^2}=420.25$

And rounded up we have that n=421

Step-by-step explanation:

We know that the sample proportion have the following distribution:

$\hat p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by:

$z_{\alpha/2}=-1.64, z_{1-\alpha/2}=1.64$

The margin of error for the proportion interval is given by this formula:

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

And on this case we have that $ME =\pm 0.04$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

We assume that a prior estimation for p would be $\hat p =0.5$ since we don't have any other info provided. And replacing into equation (b) the values from part a we got:

$n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.64})^2}=420.25$

And rounded up we have that n=421

5 0

3 years ago

No links, provide explanation.

a_sh-v [17]

Answer:

C: 18

Step-by-step explanation:

6 0

3 years ago