Answer:
-4x^2+5x-28
Step-by-step explanation:
Expand -7(x^2 +4) = 3x^2+5x-7x^2-28
Simplify 3x^2+5x-7x^2-28 = -4x^2+5x-28
Answer:
Step-by-step explanation:
Answer:
58 miles per hour
Step-by-step explanation:
Simplify by dividing 203 by 3.5 to get the simplified unit rate
The general formula for exponential growth and decays is:

if k>0 then then it is an exponential growth function. If k<0 then the function represents an exponential decay.
Now we need to classify each of the functions:
1.
The function

can be wrtten as:

comparing with the general formula we notice that k=2, therefore this is an exponential growth.
2.
The function

can be written as:

comparing with the general formula we notice that k=-4, therefore this is an exponential decay.
3.
The function

comparing with the general formula we notice that k=-1, therefore this is an exponential decay.
Answer:
Step-by-step explanation:
(x + 5)2 + 2 = 42.5
x*2 + 5*2 + 2 = 42.5
2x + 10 + 2 = 42.5
2x + 12 = 42.5
2x = 42.5 - 12
2x = 30.5
x = 30.5/2
x = 15.25