Which polynomial is factored completely? A.(4x+4) (x+1) B. 3n4 - 15n3 + 12n2 C. 121x2 + 36y D. 2x (x2-4)
1 answer:
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Answer:
6 mph
Step-by-step explanation:
Use formula
where
D = distance
r = rate
t = time
In your case,
D = 12 mi
<u>Dina:</u>
D = 12 mi
r = 8 mph
t = ?
So,
<u>Masha:</u>
D = 12 - 3 = 8 mi
r = ?
t = 1.5 hours
Then
First, add 1 on both sides of the equation to begin to isolate x
x/5 = 8
Now, to isolate x, multiply both sides of the equation by 5/1
· 
= 
= x
x= 7 · 5/1 = 7 · 5 = 35
x = 35
x/5 = 8
Now, to isolate x, multiply both sides of the equation by 5/1
x= 7 · 5/1 = 7 · 5 = 35
x = 35