2 years ago

Find the sum. Write your answer in simplest form. 4 - 100 + 8 5 00

Mathematics

1 answer:

Volgvan2 years ago

5 0

I don’t know it the last number is 8500 but I got 8404 it’s that

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Which of the following is a perfect square trinomial?

shutvik [7]

Answer:

Step-by-step explanation:

Take a look at what happens when squaring either of these...

$(ax-by)^2=(ax-by)(ax-by)=a^2x^2-2abxy+b^2y^2\\\\(ax+by)^2=(ax+by)(ax+by)=a^2x^2+2abxy+b^2y^2\\$

Notice a couple of patterns.

1. The last term has a positive coefficient. That rules out answer choices C and D.

2. The coefficient of the middle term is either $+2ab \text{ or } -2ab$ . So what are a and b? a is the square root of the x^2 term and b is the square root of the y^2 term.

$25x^2 \Rightarrow a=5\\\\9y^2 \Rightarrow b=3\\\\ab=15\\\\2ab=30$

The middle coefficient needs to be either +30 or -30. The answer is choice A.

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Step-by-step explanation:

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DochEvi [55]

I think the correct answer is 63 because 41 of 65 is 63.08 rounded to the nearest percent is 63

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A TV that usually sells for $171.38 is on sale for 15% off. If sales tax on the TV is 9%, what is the price of the TV, including

siniylev [52]

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An art-supply store sells a pad of watercolor paper after a 78% markup. If the store sells the paper for $46.99, what is the who

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