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3 years ago

How to solve -2(y + 4)-2y>8

Mathematics

2 answers:

nikitadnepr [17]3 years ago

7 0

-2y-8-2y>8
-2-2=-4y
-4y-8>8
-8+8=0
-4y>0
0÷-4=0

y>0

Butoxors [25]3 years ago

4 0

Distribute the-2 to the y and the 4 then subtract the 2y from what u just got thenbring the y to one side the answer should be y>-4

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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:

$y=x^2-6x+9$

$y+x=5$ 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:

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

$x=1, 4$

$y=4, 1$

$y-30=12x$ 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:

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

$x=-6, 7$

$y= -42, 114$

$y=x^2-2x+6$

$y=4x+10$

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

3 years ago

1/2 divided by 4=______

ycow [4]

Answer:

0.125

Step-by-step explanation:

1/2 divided by 4 equals 0.125

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3 years ago

What is the measure of an interior angle in a regular polygon with 17 sides?

Fynjy0 [20]

158.82° is the answer i found on the internet.

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Answer:

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3 years ago

How to simplify x+9+1+3x and

maxonik [38]

Answer/Step-by-step explanation:

[1] x+9+1+3x

Add the numbers

x + 10 +3x

Combine like terms

4x+10

Common factor

2(2x+5)

Solution = 2(2x+5)

.............................................................................................................................................

[2] 5a+6c+2a+3c

Combine like terms

7a+6c+3c

Combine like terms

7a+9c

Solution = 7a + 9c

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[3] 5n+6m+3n

Combine like terms

8n + 6m

Rearrange terms

6m + 8n

Solution = 6m+8n

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2 years ago