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3 years ago

Solve for x:

Mathematics

2 answers:

Nana76 [90]3 years ago

8 0

Answer:

Step-by-step explanation:

PolarNik [594]3 years ago

4 0

(-9/8)x - 7 = -25
(-9/8)x - 7 + 7 = -25 + 7
(-9/8)x = -18
((-9/8)x)/(-9/8) = -18/(-9/8)
x = 18 × (8/9)
x = 16

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Does anyone know the answer to this?

DENIUS [597]

Answer:

Step-by-step explanation:

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In order for the student to incorrectly get 361, they likely just multiplied the 380 by 19/20 rather than multiplying by the reciprocal (which would be -20/19).

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3 years ago

Consider this expression

Sloan [31]

Answer:

$\displaystyle \large{(x + 9)(x - 8)}$

The value of a is 9 and b is -8

Step-by-step explanation:

$\displaystyle \large{(x + a)(x + b) = {x}^{2} + (a + b)x + ab}$

We need to find two numbers that add up or subtract off to 1.

Then we also use the same two numbers that multiply and get -72.

Let's see:-

9 and -8 seem like correct values.

Because 9+(-8) is 9-8 = 1

And 9(-8) is -72.

Therefore:

$\displaystyle \large{ {x}^{2} + x - 72 = (x + 9)(x - 8)}$

The value of a is 9 and the value of b is -8 according to form of (x+a)(x+b)

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3 years ago

Read 2 more answers

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melisa1 [442]

Answer:

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Step-by-step explanation:

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4 years ago

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3 years ago

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Vera_Pavlovna [14]

Answer:

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Step-by-step explanation:

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