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Tamiku [17]
3 years ago
8

If (9x − 4)(9x + 4) = ax^2 − b, what is the value of a?

Mathematics
2 answers:
ASHA 777 [7]3 years ago
6 0
A=81
Hope this helps :)
deff fn [24]3 years ago
3 0
Hope this helps you.

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Find<br> ∫^[infinity]_-[infinity] x/(1+x^2)^2 dx.
son4ous [18]

Answer:

Step-by-step explanation:

integral(x/(1+x^2)^2)dx

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3 years ago
30. What is the solution to the system of equations?
sukhopar [10]

Answer:

x = 3

y = 0

z = 8

Step-by-step explanation:

a) 3x + 3y - z = 1

b) z = 8

c) -x -3y + 2z = 13

a) 3x + 3y - 8 = 1 (substitution)

a) 3x + 3y = 9

c) - x - 3y + 2(8) = 13 (substitution)

c) -x - 3y + 16 = 13

c) -x - 3y = -3

(3x + 3y = 9) + (-x -3y = -3)

= 2x = 6

x = 3

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5 0
2 years ago
Write an algebraic expression for each word phrase.
11Alexandr11 [23.1K]

Answer:

63/h - 3.14

Step-by-step explanation:

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So the answer to the division is a quotient. 63/h is the quotient of the division.

Less means subtract so the subtraction that is taking place is

63/h - 3.14 and that's your answer.

Often with these questions, you start backwards as in this question.

6 0
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