Question

Translate problem into an equation and solve.

Answer 1

Answer: 1.5 hours

Step-by-step explanation:

If Thiago and Brandon move in opposite directions at speeds of 80mph and 70mph then after 1 hour Thiago will have traveled 80 miles and Brandon will have traveled 70 miles.

Since they are in opposite directions then the distance is from

$70 + 80 = 150\ miles$

Then we know that after t hours have elapsed they are 225 miles

Then we pose the following equation

$80t + 70t = 225$

Now we solve for t

$(80 + 70) t = 225$

$150t = 225\\\\t=\frac{225}{150}\\\\t=1.5\ hours$