All categories

3 years ago

Please help me with this

Mathematics

2 answers:

sp2606 [1]3 years ago

5 0

7. 12 * 6 = 72

8. 8.50 * 4 = 34

9. 365*3 = 1095

10. 6*11 = 66

11. 5*5 = 25

12. 70*8 = 560

Anuta_ua [19.1K]3 years ago

4 0

Answer:

7) 72 inches in six feet

8) $34.00 for 4 shirts

9) 1095 days in 3 years

10) 66 cans in 11 boxes

11) 25 students in 5 groups

12) 560 pages in 8 notebooks

Explanation:

7) 12* 6= 72

8) 8.50* 4 = 34

9) 365 * 3 = 1095

10) 6 * 11= 66

11) 5 * 5= 25

12) 70 * 8= 560

You might be interested in

A blueprint for a building includes a rectangular room that measures 3 inches long and 5.5 inches wide. The scale for the bluepr

slamgirl [31]

1 inch = 10 feet.

3 inches x 10 = 30 feet

5.5 inches x 10 = 55 feet

The actual room is 30 feet x 55 feet.

The answer is true.

4 0

3 years ago

Read 2 more answers

A study was conducted to estimate the difference in the mean salaries of elementary school teachers from two neighboring states.

umka21 [38]

Answer:

$(28900-30300) -2.07 \sqrt{\frac{2300^2}{10} +\frac{2100^2}{14}} = -3301.70$

$(28900-30300) +2.07 \sqrt{\frac{2300^2}{10} +\frac{2100^2}{14}} = 501.698$

The confidence interval would be $-3301.70 \leq \mu \leq 501.698$ and since the confidence interval contains the value of 0 we don't have enough evidence to conclude that the difference between the two states for the salary of teachers are significantly different.

Step-by-step explanation:

We have the following info given by the problem

$\bar X_1 = 28900$ the sample mean for the salaries of teachers in Indiana

$s_1 = 2300$ the sample deviation for the salary of teachers in Indiana

$n_1 =10$ the sample size from Indiana

$\bar X_2 = 30300$ the sample mean for the salaries of teachers in Michigan

$s_2 = 2100$ the sample deviation for the salary of teachers in Michigan

$n_2 =14$ the sample size from Michigan

We want to find a confidence interval for the difference in the two means and the formula for this case is given by;

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2}\sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}$

The degrees of freedom for this case are:

$df = n_1 +n_2 -2= 10+14-2 =22$

The confidence is 95%so then the significance is $\alpha=0.05$ and the $\alpha/2 =0.025$ , we need to find a critical value in the t distribution with 22 degrees of freedom who accumulates 0.025 of the area on each tail and we got:

$t_{\alpha/2}= 2.07$

And now replacing in the formula for the confidence interval we got:

$(28900-30300) -2.07 \sqrt{\frac{2300^2}{10} +\frac{2100^2}{14}} = -3301.70$

$(28900-30300) +2.07 \sqrt{\frac{2300^2}{10} +\frac{2100^2}{14}} = 501.698$

6 0

3 years ago

Solve for y.<br><br> 8(y – 2) = 4y

Arte-miy333 [17]

Answer:

y =4

Step-by-step explanation:

8(y – 2) = 4y

Distribute

8y -16 =4y

Subtract 8y from each side

8y-8y -16 = 4y -8y

-16 = -4y

Divide each side by -4

-16/-4 = -4y/-4

4 = y

7 0

3 years ago

PLZ HELP CLICK THE PIC

ipn [44]

Answer:

angle A=52

Step-by-step explanation:

4 0

3 years ago

A line goes through the point (2, 4) and has a slope of 3/2. Which of the following points is also on the line? CHOOSE ALL THAT

Korolek [52]

Hmmmm not sure

Explanation: I took this test and got it correct

8 0

3 years ago