SOLUTION: Timmy bought a skateboard and two helmets for total of D dollars. If each helmet cost H dollars, the cost of the skateboard could be represented by.. A. 2DH

Algebra ->  Expressions-with-variables -> SOLUTION: Timmy bought a skateboard and two helmets for total of D dollars. If each helmet cost H dollars, the cost of the skateboard could be represented by.. A. 2DH       Log On


   

Question 1025758: Timmy bought a skateboard and
two helmets for total of D dollars.
If each helmet cost H dollars,
the cost of the skateboard could
be represented by..
A. 2DH
C. D-2H
B. DH/2
D. D-H/2
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
let S equal the cost of the skateboard.

they didn't give you this variable, so select it yourself.

you could use any variable name, but S is pretty good since it's the first letter of skateboard and it's not being used anywhere else in the equation.

you are given that H equal the cost of one helmet.

this means that the cost of two helmets is equal to 2H.

you are given that the total cost equals D.

your equation is S + 2H = D

this means thsat the cost of one skateboard and two helmets is equal to D dollars.

subtract 2H from both sides of the equation to get:

S = D - 2H

since S = cost of the skateboard, then that's your answer.

the cost of the skateboard is represented by D - 2H.