Simplify $\sqrt5-\sqrt{20}+\sqrt{45}$.
2 answers:
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Answer:
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Answer:
The number of CDs sold last week was 84 and the number of CDs sold this week was 26
Step-by-step explanation:
Let
x ---> number of CDs sold last week
y ---> number of CDs sold this week
we know that
Last week she sold 6 more than 3 times the number of CDs that she sold this week
----> equation A
Ms. Lott’s sold a total of 110 CDs over the 2 weeks
----> equation B
Solve the system by substitution
substitute equation A in equation B
solve for y
Find the value of x
therefore
The number of CDs sold last week was 84 and the number of CDs sold this week was 26