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Harrizon [31]
3 years ago
9

HELP QUICK PLEASE!!!

Mathematics
1 answer:
exis [7]3 years ago
7 0

Answer:

100

Step-by-step explanation:

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1 is the answer to nthis/...
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reasoning: if you know that 9 x 20 = 180, how can you use this to find 9 x 24? explain your strategy.
Lostsunrise [7]
9 * 20 = 180

24 has 4 more than that, so multiply 9 to 4 and add it to 180.

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Plz need help on 1. 2. and 3 plz help and dont answer if you dont know it plz
sesenic [268]

Answer:

1) 32m^{6}n^{14}

2) 3j^{4}k^{8}

3) 135a^{11}b^{16}

Step-by-step explanation:

to know: when multiplying terms with same base and exponents, multiply the bases and add the exponents

to know: when dividing terms with same base and exponents, divide the bases and subtract the exponents

to know: whenever exponents are contained within a set of parentheses and separated by another set of parentheses, multiply the exponents

1) (4^{4}· m^{12} · n^{20}) ÷ 2³m^{6}n^{6} = 3j^{4}k^{8}

2) (15j^{5}k^{2}· 25j²k^{9}) ÷ 5³j³k³ = (375j^{7}k^{11}) ÷ 125j³k³ = 3j^{4}k^{8}

3) (5 · 3³) a^{11}b^{16} = 135a^{11}b^{16}

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3 years ago
Factor Completely: x2 - 81 <br> A.(x-9)(x+9)<br> B.(x+9)(x+9)<br> C.(x-9)(x-9)<br> D.(9-x)(9+x)
Hunter-Best [27]

Answer is A

The binomial can be factored using the difference of squares formula a2-b2 = (a+b) (a-b) where a=x and b=9

(X+9) x(x-9)

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Since we have a negative on the outside of the parenthesis, we can just say that this is -1. So now we have -1(-x + 1). when multiply a negative by a negative it cancels out into a positive. and multiplying a negative with a positive will give you a negative. So now we have x - 1. 
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