Solve the problem
-Let $x$ represent the number of gallons of gas sold at $\$ 2.10$ per gallon, and let $y$ represent the total cost of the gasoline (in dollars). Write an equation for this situation. Then give the ordered pair with an $x$-value of 18 associated with this equation.
A) $x=2.10 y ;(18,8.57)$
B) $x=2.10+y ;(18,15.90)$
C) $y=2.10 x ;(18,37.80)$
D) $y=2.10+x ;(18,20.10)$

Question

Quizplus · Accepted Answer

The equation that represents the total cost of gasoline ($y$) based on the number of gallons sold ($x$) at $2.10 per gallon is $y = 2.10x$. For $x = 18$, the total cost is $y = 2.10 \times 18 = 37.80$, so the ordered pair is (18, 37.80).

Solve the Problem -Let xxx Represent the Number of Gallons of Gas Sold At

Solve the Problem
-Let $x$ Represent the Number of Gallons of Gas Sold At