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3 years ago

Help me please ...........with this work

Mathematics

1 answer:

Zolol [24]3 years ago

7 0

Answer:

Vertex form is: y = ( x + 1 )^2 − 2

Step-by-step explanation:

I'm not sure about the substitution part.

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Ma. Lott’s works at a music store. Last week she sold 6 more than 3 times the number of CDs that she sold this week. Ms. Lott’s

Contact [7]

Answer:

$x=3y+6$

$x+y=110$

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

$x=3y+6$ ----> equation A

Ms. Lott’s sold a total of 110 CDs over the 2 weeks

$x+y=110$ ----> equation B

Solve the system by substitution

substitute equation A in equation B

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solve for y

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Find the value of x

$x+26=110\\x=110-26\\x=84$

therefore

The number of CDs sold last week was 84 and the number of CDs sold this week was 26

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jeyben [28]

Answer:

Step-by-step explanation:

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