Y=3x-10 and 3x+2y=16
y=3x-10
subsitute 3x-10 for y in other equation
3x+2y=16
3x+2(3x-10)=16
distribute
3x+6x-20=16
9x-20=16
add 20 both sides
9x=36
divide both sides by 9
x=4
sub back
y=3x-10
y=3(4)-10
y=12-10
y=2
x=4
y=2
(4,2) is soluiton
He paid $643.5 for it originally
585 x .1 = 58.5
585+58.5= 643.5
hope this helps
Answer:
Answer C 2,799.159
Step-by-step explanation:

Answer: 1.221
Step-by-step explanation: The decimal goes up by 2 places.
Answer:
Step-by-step explanation:
find the average
$2520 / 20 days = ______ pay per day