2 years ago

What is the answer? A B C D

Mathematics

2 answers:

Lapatulllka [165]2 years ago

8 0

30 i believe.. let me know if i’m correct

Ilya [14]2 years ago

6 0

Answer:

Step-by-step explanation:

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If (x + y)^2 = 105 and x^2 + y^2 = 65, what is the value of xy?

lesya692 [45]

$\boxed { \boxed {(a + b)^2 = a^2 + 2ab + b^2}}$

$(x + y) ^2 = 105$

$x^2 + 2xy + y^2 = 105$

$x^2 + y^2 + 2xy = 105$

$\text{Given that } x^2 + y^2 = 65,$

$65 + 2xy = 105$

$2xy = 105 - 65$

$2xy = 40$

$xy = 20$

$\boxed { \boxed {\text{Answer: xy = 20}}}$

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The cheerleading squad at Belmont High School currently has 4 members. That is 20% fewer than were on it with the old coach. How

Sliva [168]

Answer:

Step-by-step explanation:

Divide 4 by 20%

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2 years ago

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3 years ago

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sergij07 [2.7K]

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3 years ago

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Need helpppppp!!!!!!!!!!

KonstantinChe [14]

Answer: 12, 15, 11, 28

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14. FC is half of AC so the length of FC is 12.

15. BD is 30 and half of that is BC or 15. AB and BC have same length so it is also 15.

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2 years ago

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