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gayaneshka [121]
3 years ago
5

Please help! I really need help...

Mathematics
1 answer:
Sholpan [36]3 years ago
4 0

Answer:

3y^{2}+2y-11

Step-by-step explanation:

we have

(-y^{2}-4y-8)-(-4y^{2}-6y+3)

Eliminate the parenthesis

-y^{2}-4y-8+4y^{2}+6y-3

Group terms that contain the same variable

-y^{2}+4y^{2}-4y+6y-8-3

Combine like terms

3y^{2}+2y-11

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2. Is 4x – 3 = 19 true, false, or open? <br> A)true<br> B)false<br> C)open
ElenaW [278]

Answer: B. False

Step-by-step explanation: Because you do

4x - 3 = 19

+3 +3 =4x = 22

You divide 4x divide by 4 and you get x

Then you divide 22 by 4 and get 5.5

So the answer is X = 5.5

6 0
3 years ago
X^2+15x=-45 solve by factoring
Julli [10]

1 Move all terms to one side.

{x}^{2}+15x+45=0

x

2

+15x+45=0

2 Use the Quadratic Formula.

x=\frac{-15+3\sqrt{5}}{2},\frac{-15-3\sqrt{5}}{2}

x=

2

−15+3

5

,

2

−15−3

5

3 Simplify solutions.

x=-\frac{3(5-\sqrt{5})}{2},-\frac{3(5+\sqrt{5})}{2}

x=−

2

3(5−

5

)

,−

2

3(5+

5

)

6 0
3 years ago
Read 2 more answers
A small town had a population of 960 people last year. The population increased to 1200 people this year. By what percentage did
Licemer1 [7]

Answer:

25%

Step-by-step explanation:

25% of 960 is 240. to find that we need to do...

0.25 x 960 = 240

add the percent increace to the 960.....

960 + 240 = 1,200

Hope this helped! Please mark as brainliest! Thanks!!

8 0
3 years ago
The current temperature in Smalltown is 19 °F. This is 7 degrees less than twice the temperature that it was six hours ago. What
Anna007 [38]

Answer:

5 degrees F

Step-by-step explanation:

because 7 x 2= 14

19-14=5

7 0
3 years ago
Which of the following inequalities matches the graph.
bixtya [17]
Answer: B (y>2) I hope this helps you
5 0
3 years ago
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