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SpyIntel [72]
3 years ago
11

Noah bought 5 CDs and a DVD for a total of $57. The DVD cost $12. The CDs were each the same price. How much did Noah pay for ea

ch CD?
•Equation:

•So, Noah paid ______ for each CD.
Mathematics
1 answer:
raketka [301]3 years ago
7 0
I believe $11.4 not sure
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Halp again sorry:<<<<<<​
IRINA_888 [86]

Answer:

The one in the middle goes first the one first goes to the middle the last one stays there

6 0
3 years ago
What is the difference between -3 and 7? *
Murrr4er [49]

Answer:

4

Step-by-step explanation:

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6 0
3 years ago
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If alpha and beta are the zeroes of the polynomial f(x)= xsquare -8x +gamma such that alpha - beta = 2 find the value of gamma.
Komok [63]

Answer:

Γ = 15

Step-by-step explanation:

Given

f(x) = x² - 8x + Γ

with a = 1, b = - 8 and c = Γ , then

sum of zeros α + β = - \frac{b}{a} = - \frac{-8}{1} = 8

product of zeros = αβ = \frac{c}{a} = Γ

Given α - β = 2 , then

(α - β)² = 2²

α² - 2αβ + β² = 4 → (1)

and

(α + β)² = 8²

α² + 2αβ + β² = 64 → (2)

Add (1) and (2) term by term

2α² + 2β² = 68 ( divide through by 2 )

α² +β² = 34

Substitute α² + β² = 34 into (1)

34 - 2αβ = 4 ( subtract 34 from both sides )

- 2αβ = - 30 ( divide both sides by - 2 )

αβ = 15

Now

αβ = Γ = 15

Thus

f(x) = x² - 8x + 15

4 0
3 years ago
What are the steps to find (2+2i)(5+3i)?
WITCHER [35]

(2+2i)(5+3i)
10+6i+10i+6i^2
10+16i+6(-1)
4+16i
When you have an “i^2”, you also have a negative one. The simplified answer is 4+16i
6 0
2 years ago
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The answer/ why it’s right
pantera1 [17]
<h2>AREA OF RECTANGULAR PRISM=AREA OF cuboid =l×b×h</h2><h2>=15x×7x×3x</h2><h2>=315x³</h2>

FOLLOW ME FOR CLEARING YOUR NEXT DOUBT

4 0
3 years ago
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