(2n - 9) - 5(-2.4n + 4) =
The first set of parentheses is unnecessary, so we just drop them.
= 2n - 9 - 5(-2.4n + 4)
Now we distribute -5 by the second set of parentheses. Each term in the parentehses is multiplied by -5.
= 2n - 9 + 12n - 20
Now we combine like terms.
= 2n + 12n - 9 - 20
= 14n - 29
So he drove at 70 miles per hour right?
This means he travels 70 miles in 1 hour.
So to find the distance he drove in 3.5 hours we have to multiply 3.5 by 70 right?
So 3.5*70 is 245.
So he travelled 245 miles in three and a half hours
Answer:
if those are two different equations the you have
x = 2 y = -1
Step-by-step explanation:
I've given you the step by step solution above.
B to the power of two -30.
Answer:
4cm
Step-by-step explanation:
The formula for area of a triangle is hxb/2 so plug in the the area so the equation looks like hx5/2=10 and you get 4 for height