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3 years ago

What is x equal? 5x−7=8 ; {1, 2, 3, 4}

1 answer:

Klio2033 [76]3 years ago

3 0

How does x=3?

Simple. 5x-7=8 is the equation displayed.

We add 7 to both sides so we can try to cancel as many things as possible. 5x-7+7=8+7 ===>15.
We now have to cancel that 15 to get x. We do the opposite of multiplying by 5 (seen when 5 and x are together) we divide by 5 to both sides ====> 5x/5=15/5 ======> x=3. Thus, x is equal to 15!

Hope this helps!!!

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Mikayla's mom told her she will make her a special dinner if she scores 80% on her

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Answer:

Step-by-step explanation:

80% of 25 is 20, even if you put it into a calculator

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4 years ago

One rectangle has a base of 12 inches and an altitude of 6 inches. The other has a base of 10 inches and an altitude of 5 inches

guajiro [1.7K]

Ratio of their bases = $$\frac{12}{10}$

Ratio of their altitudes = $$\frac{6}{5}$

<u>Step-by-step explanation:</u>

For first rectangle, it was given that

Base 1 = 12 inches

Altitude 1 = 6 inches

For the second rectangle, it was given that

Base 2 = 10 inches

Altitude 2 = 5 inches

Ratio of their bases is given by the ratio of the base of the first rectangle to the second one.

Ratio of their altitudes is given by the ratio of the altitude of the first rectangle to the altitude of the second rectangle.

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Ratio of their altitudes = $$\frac{6}{5}$

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3 years ago

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3 years ago

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X^{2} -25=0 Please help meeee

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Answer:

$x=5,x=-5$

Step-by-step explanation:

$x^2-25=0$

Add 25 to both sides:

$x^2-25+25=0+25$

$x^2=25$

Square root both sides:

$x=\sqrt{25},\:x=-\sqrt{25}$ (Since a negative number multiplied by itself gives positive, there are two answers.)

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4 years ago

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How can i solve this 4(3x-1)=3+8x-11

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Simplify

4(3x−1)=3+8x−11

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12x−4=8x+−8

12x−4=8x−8

Subtract 8x from both sides.

12x−4−8x=8x−8−8x

4x−4=−8

Add 4 to both sides.

4x−4+4=−8+4

4x=−4

Divide both sides by 4.

4x/4=−4/4

x=−1

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4 years ago

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