Ask question

Ask question

All categories

julia-pushkina [17]

3 years ago

7

Sandy is working with a carpenter to frame a house. They are using 8-foot-long boards, but each board must be cut at 7 feet, 10

3/4 inches long. How much is cut off each board? (with detailed explanation please!)

1 answer:

Kay [80]3 years ago

7 0

hi

bye

hi

bye

hi

bye

hi bye

You might be interested in

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

7 0

3 years ago

If f(x)=-2x^2+5x-3 and g(x) is the reflection of f(x) across the y-axis, then an equation of g is which of the following

Ymorist [56]

To reflect a function across the y-axis you have to change

$x\mapsto -x$

So, the function becomes

$f(x)=-2x^2+5x-3 \mapsto f(-x)=-2(-x)^2+5(-x)-3=-2x^2-5-3$

3 0

3 years ago

If the angle of elevation to a pole is 67 degrees and the wire is attached to the ground at a point 137 feet from the base of th

Dmitrij [34]

Tan67=h/137

h=137tan67

h≈322.751 ft

h≈322.75 ft (to nearest hundredth of a foot)

6 0

3 years ago

I’m confused on how to answer this question

tester [92]

Answer:

i can do A for u

Step-by-step explanation:

the seed is one variable and the place where it was planted is another

8 0

2 years ago

What is the value of F(x)=3x-12forx=9?

GrogVix [38]

Answer:

15

Step-by-step explanation:

3(9)=27

27-12=15

7 0

3 years ago