Answer:
D. Infinite solutions.
Step-by-step explanation:
Since they give us the equation for (y) we just implement that equation in place of (y) in the second equation
15x+3y=27 now becomes
15x+3(-5x+9)=27
Distribute the 3
15x-15x+27=27
15x and -15x cancel out
27=27
Infinite solutions since both sides are exactly equal.
Hope this helps! If you have any questions on how I got my answer feel free to ask. Stay safe!
The expression

has two similar pairs of <span>conjunctions.
</span>
1. Rewrite this expression as


and then
2. add the similar <span>conjunctions
</span><span>
</span><span>

.</span><span>
</span><span />
Answer:
7(3 + 7)
Why:
7x3=21
7x7=49
Answer:
Amount used by the end of the second week= $500-$375
=$125
Amount used by the end of the seventh week= $375-$100
=$275
Total amount spent= $275+$125
=$400
Rate of change= $ 500- $400
=$ 100
Step-by-step explanation: Hope this helps