Which of these is the algebraic expression for "3 times the sum of 2 and y?"
2 answers:
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Step 1
From the question;
We are required to find how many months it will take him to read 90 books
Step 2
We will use the ratio below to solve the problem.
Answer; It will take Bobby 9months to read 90 booj
Answer:
D. (–3, –6) and (5, 10)
Step-by-step explanation:
The system has equations:
...(1)
and
...(2)
Equate both equations;
Rewrite in standard form:
We factor to obtain:
By the zero product principle;
When x=-3, y=2(-3)=-6
This yields the ordered pair (-3,-6).
When x=5, y=2(5)=10
This yields the ordered pair (5,10).
The correct choice is D.