KingAlex
Answered

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

A7/2x

B)-13/2

C)-6x+14

D)-3/2x+5


An airplane's altitude changed -378 feet over 7 minutes. What was the mean change of altitude in feet per minute?



WORK PLEASE

Verified Answer :

apologiabiology

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

arnfrs

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



Related Questions