Mia's average driving speed is 10 mph than thelmas. In the same length of time it takes mia to drive 240 miles, thelma only drives 200 miles. What is mias average speed

Question

anonymous · Answer

please help!

anonymous · Answer

I need the answer right now! I just can't figure it out!

anonymous · Answer

x(240/(x+10))=200
240x = 200x + 2000
40x = 2000
x= 50

so Mia's driving speed is 60mph

anonymous · Answer

let X = Thelma's speed.
X+10 is Mia's speed then.
T is the amount of time that passes.

(X+10)T=240 for Mia
XT=200 for Thelma

Solve for T for either Mia or Thelma and then substitute that into the other equation.

anonymous · Answer

Refer to the Mathematica 9 attachment.