5 times a half is 2.5. You can't buy 2.5 boxes so you have to round it up to 3. You would need three boxes of nails.
You already have all you need. Just put in it the slope-intercept form: y=mx+b where m is the slope and b is the y-intercept so
y=7x-4
Answer:
Prism A:

Prism B:

Step-by-step explanation:
Given
See attachment for prisms

Required
Determine the surface area of both prisms
Prism A is triangular and as such, the surface area is:

Where

and

Such that a, b and c are the lengths of the triangular sides of the prism.
From the attachment;

So, we have:




Also:




So:



Prism B is a rectangular prism. So, the area is calculated as:

From the attachment


So:


Answer:
When it is small & when the sample has things that are different from the population.
Step-by-step explanation:
A small sample has less chance of accurately reflecting a population & too many variables can also negatively influence the study.
9a-ab+5b
9(2)-(2)(7)+5(7)
18-14+35
39