Because like terms you add or subtract together to make it easier to do the problem. just like you do with whole numbers. you add an subtract to make the answer simpler.
Answer:

Step-by-step explanation:
-The volume of a cylinder is given by the formula:

#We make r the subject of the formula:

#We then substitute for the stated volume and solve for r:

Hence, the cylinder's radius is approximately 5.00 ft
<span>y=x^2+5x+6
y=4x+12
Solution = (-3,0) and (2,20)
</span><span>y=x^2-3x-1
y=8x-1
Solution = (0,-1) and (11,87)</span>
Answer -15 because it would be 15 but the negative would be turned into a negative again
43.75LB is the answer. I’m assuming you mean 28 divided by 0.64