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katovenus [111]
3 years ago
15

Simplify (25x^2-14xy+4)-(7x^2-9y)+(2xy+7)

Mathematics
1 answer:
givi [52]3 years ago
5 0
First distribute the negative to the second equation which would give you:

25x^2 - 14xy + 4 -7x^2 + 9y + 2xy + 7

Since addition is commutative. you can now just add like terms.

18x^2 - 12xy + 9y + 11
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The length of a football field is 120 yards from one and one to the other end zone.​
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Answer:

To solve, you need to use Pythagorean Theorum

a^2+b^2=c^2

100^2+53.33^2 = c^2

10,000+2844.0889=c^2

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square root

= 113 1/3 yards

So it is less than 120 yards

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

In order to calculate at which time both objects have the same height we need to find the value of t that makes both equations equal. Therefore:

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