A because you would have to multiply 5x2x8x10
3y+2y-1=4
5y=5
Y=1
Y would equal 1 because 5 divided 5 is equal to 1.
Answer:
The answer is b.
Step-by-step explanation:
USE SUBSTITUTION FOR 3A+4S=57, 2A+8S=86 to find adult=$7 student=$9
CHECK STEP: 3(7)+4(9)=57
21+36=57 TRUE