Answer:
coolshirts.com will sell the t shirts for %7.5
Explaination:
the company pays 2.50 to make the shirt and has a 300% mark up.
300% as a decimal is 3 and then you just multiply 2.50 by 3 to get 7.5
0.84 is 10 times as much as 0.084
Your question is not clear, if you are asking: what is

simplified? Then the answer is

or

.
If 63 is just the question number and you are asking, what is

simplified. Then the answer is

or

You get this answer by finding the highest number that both the numerator and denominator are divisible by, and diving both numbers by that:
Answer:
y = x-4
Step-by-step explanation:
First find the slope
m = ( y2-y1)/(x2-x1)
= ( -3 -1)/( 1 - 5)
= -4/-4
= 1
Then using slope intercept form
y = mx+b where m is the slope and b is the y intercept
y = 1x+b
Substitute one of the points in
1 = 5 +b
1-5 = b
-4 =b
y = x-4