Which is the simplified form of the expression? 3(7/5x + 4) - 2(3/2 - 5/4x)
A.-39/5x - 11/2
B.67/10x + 9
C.3/10x + 5/2
D. 15 + 76/10x

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Ineed with math stuff it involves graphs