A friend gave Ms. Morris a $50 gift
card for a local car wash. If each car
wash costs $6, which equation
shows the number of dollars left on
the card?
Select one:
a. 50x + 6y = 1
b. y = 6x + 50
c. y = -6x + 50
d. y = 6x - 50

Question

A friend gave Ms. Morris a $50 gift
card for a local car wash. If each car
wash costs $6, which equation
shows the number of dollars left on
the card?
Select one:
 a. 50x + 6y = 1
 b. y = 6x + 50
 c. y = -6x + 50
 d. y = 6x - 50

anonymous · Answer

y = 50 - 6x 

$50 is the initial amount on the car and will be reduced by the number of car washes (x). As each car was is $6, the dollar amount will be "paired" with the variable "x" to be 

y = 50 - 6x

anonymous · Answer

its d

anonymous · Answer

c is simply another way of writing 50 - 6x, as the negative is "tied" to the 6x. It can be moved around. Simply treat the absence of a sign infront of "50" to be positive. Therefore,

y = -6x + 50

anonymous · Answer

thanks(: