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1 year ago

Which equation has the solution x=4?

Mathematics

2 answers:

ElenaW [278]1 year ago

8 0

Answer: Option C is correct.

⇒ 4x = 20

⇒ x = 20/4

⇒ x = 5

⇒ x/2 = 8

⇒ x = 8(2)

⇒ x = 16

⇒ x + 8 = 3x

⇒ 3x - x = 8

⇒ 2x = 8

⇒ x = 4

⇒ x = (x + 5)/2

⇒ 2x = x + 5

⇒ 2x - x = 5

⇒ x = 5

Paraphin [41]1 year ago

3 0

I believe the answer is C

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Answer: 12 -8 = 4

Step-by-step explanation:

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3 years ago

What 3 numbers can be multiplied together to get 180?

hichkok12 [17]

2×6×15=180

Step-by-step explanation:

2×6=12

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3 years ago

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Maksim231197 [3]

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3 years ago

F(x) = x2 - 8x - 20<br> What is the axis of symmetry, vertex, and y intercept

igor_vitrenko [27]

1. vertex is -4 because:

x^2-8x-20,

a=1, b=-8 , c=-20

use vertex form! -b/2a = -8/2(1) = -8/2 = -4.

2. axis of symmatry is the x which is also -4. The same steps go for the second one.

3. y intercept, I think the answer is -20. Im not sure for this one.

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5 0

3 years ago

3x - 4y = 18<br>x + 3y = -7

Mnenie [13.5K]

Answer:

x=2, y=-3

Step-by-step explanation:

x+3y+-7

move variable to the right and -3y from each side

x+3y-3y=-7-3y

x= -7-3y

3x -4y=18

3(-7-3y)-4y=18

solve for y, distribute

-21-9y-4y=18

collect like terms

-21-13y=18

move constant and change sign

-13y=18+21

add

-13y=39

divide by -13

y= -3

substitute

x=-7-3(-3)

solve

x=2

4 0

3 years ago