A high school basketball team has a budget specifically for towels and extra basketballs. A towel costs $3 and a basketball costs $18. Assume the budget is $450 and that 30 towels are needed for the team for the entire season.
Use a standard form equation to determine how many basketballs may be purchased by the team.
A. 5
B. 15
C. 20
D. 30

C. 20

Step-by-step explanation:

Given

30 towels= 90$

450$-90$=360$

360$\18$=20 basketballs

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116