Mr. Green drove 100 miles in 2 hours. He continues to drive at this same speed, If he does not stop, how long will it take Mr. Green to drive 400 more miles?

A.5 hours
B.4 hours
C.8 hours
D.9 hours

For what value of x does 4x = (1/8) x + 5?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.