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3 years ago

Solve for X. - 3x + 2 = -10x + 30

Mathematics

1 answer:

Nataly_w [17]3 years ago

3 0

Answer:

x = 4

Step-by-step explanation:

-3x + 2 = -10x + 30

Add 10x to both sides and you get

7x + 2 = 30

Subtract 2 from both sides and you get

7x = 28

Divide both sides by 7 to get x by itself and you get

x = 4

Reminder whatever you do to one side you have to do to the other side!

Hope this helps!

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6 2/3 divided by 2 thank you please help me answer this

AURORKA [14]

Answer:

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3 years ago

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Which equation is equivalent to sqrt x +11=15

Bas_tet [7]

Answer:

x=16

Step-by-step explanation:

We are given that

$\sqrtx+11=15$

we have to solve this equation for x

in order to do that we need to isolate x first

hence

subtracting 11 from both sides we get

$\sqrtx+11-11=15-11$

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Now we square on both sides we get

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2 years ago

What is the value of 7(x+4)² - 3x when x = 2?

sdas [7]

Answer: the value of 7x-y is -14.

Step-by-step explanation:

When x=2 and y=4,

To find the value of 7x - y when x =2, y = 4, this means when ever you see x, put 2 in replacement, y, put 4 respectively.

7x - y = 7(2 - 4)

14 - 28

= -14.

5 0

2 years ago

A major car dealership has several stores in a big city. The owner wants to determine if there is a difference in the proportion

Gemiola [76]

Answer:

confidence interval = ( -0.38 , 0.08 )

Step-by-step explanation:

Given data :

n1 = 55 , n2 = 60 ,

Let P1 ( proportion of SUV sales at store A ) = 30 / 55 = 0.55

P2 ( sample proportion of SUV sales at store B ) = 42/60 = 0.70

The Z-value at 99% confidence Interval = 2.58

<u>Determine the 99% confidence interval for difference in proportion</u>

applying the formula below

( P1 - P2 ) ± Z ( $\sqrt{p1( 1-p1)/n1 + p2(1-p2)/n2}$

Input values above into equation

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3 years ago

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aksik [14]

Answer:

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She downloads 4 songs for every week which is represented as 4w, and she started with 120 songs which is represented as +120.

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