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disa [49]
3 years ago
7

5(y-4)=7(2y+1)I need the answer​

Mathematics
1 answer:
8_murik_8 [283]3 years ago
8 0

Answer: y = -3

Move all terms containing y to the left, all other terms to the right

<u>Add -14y to each side of the equation</u>

<u></u>-20 + 5y + -14y = 7 + 14y + -14y<u></u>

<u></u>

<u>Combine like terms: 5y + -14y = -9y </u>

<u></u>-20 + -9y = 7 + 14y + -14y<u></u>

<u></u>

<u>Combine like terms: 14y + -14y = 0 </u>

<u></u>-20 + -9y = 7 + 0\\-20 + -9y = 7<u></u>

<u></u>

<u>Add '20' to each side of the equation</u>

<u></u>-20 + 20 + -9y = 7 + 20<u></u>

<u></u>

<u>Combine like terms: -20 + 20 = 0 </u>

<u></u>0 + -9y = 7 + 20\\-9y = 7 + 20<u></u>

<u></u>

<u>Combine like terms: 7 + 20 = 27 </u>

<u></u>-9y = 27<u></u>

<u></u>

<u>Divide each side by -9</u>

<u></u>-9y/9=27/-9\\y=-3<u></u>

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A rational number whose square root is a whole number. True or False
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Answer:

Step-by-step explanation:

FALSE

6 0
3 years ago
1. Susan’s art class is 9 hours long. How long is her class in minutes?
erastova [34]
1. 9(60) = 540 minutes.

2. There is 0.5 pints = 1 cup, so three cups. :)

3. 4(2) = 8 pints.

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4 0
3 years ago
You need 1 1/4 cup of sugar to make 20 cookies to make 12 cookies how much sugar do you need​
solniwko [45]
3/4 bc 1 1/4 divided by 20 is 1/16. 1/16 times 12 is 3/4
5 0
2 years ago
Please help! .........
stira [4]

Answer:

1) When x is 1, y is 4, and vice versa

2) When x is -6, y is 42, and when x is 7, y is 114

3) When x is -2, y is 2, and when x is 8, y is 42

Step-by-step explanation:

1)

y=x^2-6x+9

y+x=5 which can be rearranged as y=5-x.

Substituting this lone y into the first equation, you get:

5-x=x^2-6x+9

Move everything to one side:

x^2-5x+4=0

Factor:

(x-4)(x-1)=0

x=1, 4

y=4, 1

2)

y-30=12x which can be rearranged as y=12x+30.

y=x^2+11x-12

Let's use elimination this time and subtract the first equation from the second:

0=x^2-x-42

Factor:

(x-7)(x+6)=0

x=-6, 7

y= -42, 114

3)

y=x^2-2x+6

y=4x+10

Let's set the two equations equal to each other through substitution:

x^2-2x-6=4x+10

Move everything to one side:

x^2-6x-16=0

Factor:

(x-8)(x+2)=0

x=-2, 8

y= 2, 42

Hope this helps!

6 0
2 years ago
Courtlynn combines 7/8 cup sour cream with 1/2 cream cheese she then divides the mixture between 2 bowls how much mixture does c
natta225 [31]
7/8 + 4/8= 11/8 so 11/8 ÷2 = 5.5/8 she puts 5 1/2 /8 cups of the mixture in each bowl
4 0
3 years ago
Read 2 more answers
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