<h3>
Answer:</h3>
(5/7, 12/7) <- I think you meant to type that. Its the first one
<h3>
Step-by-step explanation:</h3>
Step 1: Substitute y=x+1 in for y in 5x + 2y = 7
5x + 2(x+1) = 7
Step 2: Solve it
5x + 2x + 2 = 7
7x + 2 = 7
- 2 - 2
7x = 5
--- ---
7 7
x = 5/7
Step 3; Plug x into y=x+1
y = 5/7 + 1
y = 12/7
Each friend spent $50 (50+50+50= 150)
Sarah spent twice as much as them150*2=300
altogether they spent $150+$300= $450
(just edited sorry for previous mistake)
Answer:
378 sq feet
Step-by-step explanation:
Answer: Its the 4th choice
Step-by-step explanation:
-12 + 8 = -4
