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3 years ago

Solve 2(3-a)=18 for a

Mathematics

2 answers:

Free_Kalibri [48]3 years ago

8 0

Answer:

Step-by-step explanation:

Alinara [238K]3 years ago

7 0

Answer:

a=-6

Step-by-step explanation:

2(3-a)=18

3-a=18/2

3-a=9

a=3-9

a=-6

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34kurt

Answer:

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Step-by-step explanation:

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3 years ago

A/ab-bsquare + b/ab-asquare?

lord [1]

Answer:

$\dfrac{(a+b)}{ab}$

Step-by-step explanation:

The given expression is :

$\dfrac{a}{ab-b^2}+\dfrac{b}{ab-a^2}$

It can be solved as follows :

$\dfrac{a}{ab-b^2}+\dfrac{b}{ab-a^2}=\dfrac{a}{b(a-b)}+\dfrac{b}{a(b-a)}\\\\=\dfrac{a}{b(a-b)}+\dfrac{b}{-a(-b+a)}\\\\=\dfrac{1}{a-b}(\dfrac{a}{b}-\dfrac{b}{a})\\\\=\dfrac{a^2-b^2}{ab(a-b)}\\\\=\dfrac{(a-b)(a+b)}{ab(a-b)}\\\\=\dfrac{(a+b)}{ab}$

So, the solution of the given expression is equal to $\dfrac{(a+b)}{ab}$ .

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3 years ago

QRST is a rectangle. If RT = 5x – 5 and SQ = x + 11, find the value of x.

Hatshy [7]

5x - 5 = x + 11
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3 years ago

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evablogger [386]

Answer: A

Step-by-step explanation:

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1. Swap x and y.

$x=2y^2-8$

2. Solve for the new y.

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Divide by 2.

$\frac{x+8}{2}=y^2$

Extract the square root.

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creativ13 [48]

Answer:

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