Question

Which expression is equivalent to 1/4(8-6x+12)?

Answer 1

First Question:

$\frac{1}{4}(8-6x+12) =$
$\frac{8}{4}-\frac{6x}{4}+\frac{12}{4} =$
$2-\frac{3}{2}x+3 =$
$\boxed{(D) -\frac{3}{2}x+5}$

Second Question:

The average (mean) rate of change is just $\dfrac{-378}{7} =\boxed{-54 ft/min}$

Hope this helps :D

Answer 2

So which is equivilent
pemdas

(8-6x+12)
(20-6x)
multiply/distribute
1/4(20-6x)
5-6/4x=5-3/2x=-3/2x+5

the answer is D



so mean is equivilent to average

per minute means x feet for every one minute=xfeet/1miin=x/1

so just divide
-378/7=-54

mean change in altitude
-54 feet per minute