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8090 [49]
3 years ago
10

Evaluate expression when r= 9 3 (5r-3)-2 (6r-7)

Mathematics
1 answer:
Mama L [17]3 years ago
7 0

Answer:

47

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.


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Solve Quadratic Equations by Factoring:
mr_godi [17]

Answer:

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Step-by-step explanation:

Factoring is aided by having the equations in standard form. The first step in each case is to put the equations in that form. The zero product property tells you that a product is zero when a factor is zero. The solutions are the values of x that make the factors zero.

1. x^2 -x = 0

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2. 16x^2 +1 = 0

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3. x^2 +10x +25 = 0

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5 0
3 years ago
A musician spends 90 minutes practicing piano and guitar the time spent is 30 minute less than twice the same time spent on guit
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Answer:

The which spends on the piano is( 50 minutes )

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Step-by-step explanation:

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I hope that is useful for you :)

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Step-by-step explanation:

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