I'll take this challenge since I'm not feeling lazy for once.... x would represent Gavin and y would represent Seiji.
a.
b. I will solve your system using substitution.
<span>Step 1: Solve </span>

for x

(add -y for both sides)

<span>Step 2: substitute </span>

for x in


<span>
</span>


(simplify both sides of the equation)

(add -425 to both sides)<span>
</span>


y=200
step 3: substitute 200 for y in





c. Already answered with the picture that is attached.
d. Gavin earned 225 dollars while Seiji earned 200 dollars.
Answer =9.91666667 days. Hope this helps.
Answer:
<h2>360</h2>
Step-by-step explanation:
<h3>3^2 × (-2)^3 × 5</h3><h3>= 9 × 8 × 5</h3><h3>= 72 × 5</h3><h3>= 360</h3>
Thank you ☺️☺️
5x + 7 = 27
5x = 27 - 7
5x = 20
x = 20 ÷ 5
x = 4
2p - 15 = 35
2p = 35 + 15
2p = 50
p = 50/2
p = 25