Question

Can someone please help me with this quick question? it's the last one on my 8th grade homework

Sylvain spent a total of 18 hours on English and math homework over the last 3 weeks. He spent twice as much time on English than on math. Let x represent the number of hours spent on English and y represent the number of hours spent on math.

x+y=18
x=2y

What is the solution of the system of equations?
(12, 6)
(6, 12)
(9, 9)
(15, 3)

Answer 1

Substitute:
2y + y = 18
3y = 18
y = 6
Resub:
x = 2y
x = 2(6)
x = 12
(12,6)

Answer 2

@xGuardians Aisha bought 15 apples and oranges for $9.00. Each orange costs $0.50, and each apple costs $0.65. Let x represent the number of oranges and y represent the number of apples. Which system can be used to find the number of apples and oranges Aisha bought?

Answer 3

Why did you change your profile pic?

Answer 4

.5x + .65y = $9.00
x+y = 15
Solve for one side
x = 15 - y
Resub
.5(15-y)+.65y = 9.00
7.5 - .5y + .65y = 9.00
-.5y + .65y = 1.5
.15y = 1.5
y = 10
Resub again
x+y=15
x + 10 = 15
x = 5

Orange = x
Apple = y
Orange = 5
Apple = 10