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3 years ago

A=bx+cx/2 please help

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

5 0

Answer:

I'm too tired to explain, here's some digital work on a site called Symbolab:

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Answer asap pllsssssss

Margaret [11]

Answer:

x + 3 = 14

Step-by-step explanation:

x + 3 = 14

x = 14 - 3

x = 11

4 0

3 years ago

A group of physical education majors was discussing the heights of female runners and whether female runners tended to be tall,

Anna11 [10]

Answer:

The 90% confidence interval for the mean µ of the population of female runners.

( 65.0328 , 66.5672)

Step-by-step explanation:

Step(i)

Given A sample of 12 runners showed a sample mean height of 65.80 inches and a sample standard deviation of 1.95 inches.

Given sample size is n = 12 <30 so small sample

Given sample mean (x⁻) = 65.80 inches

sample standard deviation (S) = 1.95 inches.

Step(ii)

Assume the population is approximately normal.

The 90% confidence interval for the mean µ of the population of female runners.

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } ,x^{-} +t_{\alpha } \frac{S}{\sqrt{n} } )$

substitute all above interval

$(65.80 - t_{\alpha } \frac{1.95}{\sqrt{12} } ,65.80 +t_{\alpha } \frac{1.95}{\sqrt{12} } )$

The degrees of freedom γ=n-1 = 12-1=11

From t- table = 1.363 at 90 % 0r 0.10 level of significance

$(65.80 -1.363 \frac{1.95}{\sqrt{12} } ,65.80 +1.363 \frac{1.95}{\sqrt{12} } )$

on calculation , we get

(65.80 -0.7672 ,65.80 + 0.7672)

( 65.0328 , 66.5672)

8 0

3 years ago

Amy and Roger both wash windows at a large downtown building. Amy can wash 25 windows in 4 hours. Roger can wash 32 windows in 6

mote1985 [20]

Amy can wash 75 cars in 12 hours, Roger can wash 64 cars in 12 hours.
so therefore 75+64 =139
together they can wash 139 cars in 12 hours

4 0

2 years ago

Read 2 more answers

Financial Literacy Sandy has $200 in her bank account. a. If she writes 6 checks for exactly 19.98, what expression describes th

sveta [45]

She would be withdrawing moey from her account or subtracting it (-)

7 0

3 years ago

What is the volume of a sphere with a surface area of 16π ft²?

zheka24 [161]

Sphere Surface Area = 4 • π • r²
For it to equal 16 PI, then radius must equal 2
4*PI*2*2 = 16 PI


Sphere Volume = 4/3 • π • r³

Sphere Volume = 4/3 • π • 2^3

Sphere Volume = 4/3 *PI * 8

Sphere Volume = 32 / 3 PI


Sphere Volume = 10.666 PI cubic feet AND I think that is answer B
which SHOULD read 10 (2/3) PI ft^3

4 0

3 years ago

Read 2 more answers