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3 years ago

-3x + 12 = 18 please help it’s urgent

Mathematics

2 answers:

Lostsunrise [7]3 years ago

3 0

Answer:

Move all terms that don't contain x to the right side and solve.

x = −2

Marysya12 [62]3 years ago

3 0

Answer:

x=-2

Step-by-step explanation:

-3x-2=6

6+12=18

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What is 5.138 + 2.624 = ? (show ur work)

Mrac [35]

Answer:

7.762

Step-by-step explanation:

Brainliest!

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2 years ago

Shortern this expression pls

pogonyaev

Answer:

$c =\frac{8}{3}$

Step-by-step explanation:

Given

$c = \sqrt{\frac{4 + \sqrt 7}{4 - \sqrt 7}} + \sqrt{\frac{4 - \sqrt 7}{4 + \sqrt 7}}$

Required

Shorten

We have:

$c = \sqrt{\frac{4 + \sqrt 7}{4 - \sqrt 7}} + \sqrt{\frac{4 - \sqrt 7}{4 + \sqrt 7}}$

Rationalize

$c = \sqrt{\frac{4 + \sqrt 7}{4 - \sqrt 7} * \frac{4 + \sqrt 7}{4 + \sqrt 7}} + \sqrt{\frac{4 - \sqrt 7}{4 + \sqrt 7}*\frac{4 - \sqrt 7}{4 - \sqrt 7}}$

Expand

$c = \sqrt{\frac{(4 + \sqrt 7)^2}{4^2 - (\sqrt 7)^2}} + \sqrt{\frac{(4 - \sqrt 7)^2}{4^2 - (\sqrt 7)^2}$

$c = \sqrt{\frac{(4 + \sqrt 7)^2}{16 - 7}} + \sqrt{\frac{(4 - \sqrt 7)^2}{16 - 7}$

$c = \sqrt{\frac{(4 + \sqrt 7)^2}{9}} + \sqrt{\frac{(4 - \sqrt 7)^2}{9}$

Take positive square roots

$c =\frac{4 + \sqrt 7}{3} + \frac{4 - \sqrt 7}{3}$

Take LCM

$c =\frac{4 + \sqrt 7 + 4 - \sqrt 7}{3}$

Collect like terms

$c =\frac{4 + 4+ \sqrt 7 - \sqrt 7}{3}$

$c =\frac{8}{3}$

4 0

3 years ago

When x is divided by 5 the remainder is 4 and when x is divided by 9 the remainder is 0 what is x?

Marrrta [24]

The number could be any multiple of nine that ends in 4 or 9, like 9, 54, 99, 144, etc.

5 0

3 years ago

Which expression is equivalent to 6 (3 x minus 4)?

tresset_1 [31]

I’m pretty sure it’s 18x +24

4 0

4 years ago

Read 2 more answers

I chose A<br> I want to know if I did this correct

seropon [69]

2y/(y²-8y+5) - 1/(y-5)=
2y/(y-5)(y-3) - 1/(y-5)=
Least common multiple=(y-5)(y-3)
2y-1(y-3) / (y-5)(y-3)=
2y-y+3 / (y-5)(y-3)=
y+3 / (y-5)/y-3)

Answer : (y+3) / (y-5)(y-3).

you did right, congratulations!!.

6 0

3 years ago