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Anna71 [15]
2 years ago
6

Simplify. (-7y^2+4y+9)+(6y^2-5y+9)-(2y^2-9y-2)

Mathematics
1 answer:
Natali5045456 [20]2 years ago
7 0

Combine like terms

-7y² + 6y² - 2y² = -3y²

4y + (-5y) - (-9y) = 4y - 5y + 9y = 8y

9 + 9 - (-2) = 9 + 9 + 2 = 20

-3y² + 8y + 20 is your answer

hope this helps

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What is the slope and the y-intercept of the graph of the linear function shown on the grid ?
VladimirAG [237]

Answer:

Slope: -1/4; Y-Intercept: 1.5

Step-by-step explanation:

Step 1: Find the slope. The best way to do this is to transform the two given points to y=mx+b form. When given two points, the best way to find the slope will be to do y2-y1/x2-x1. In this equation it would be -2-0/2+6, which is -2/8, simplified is -0.25 or -1/4. So we have the slope, which can determine the length of the line.

Step 2: Find the Y-Intercept. Finding the Y-intercept is so much simpler when given a graph, since all you have to do is find where the line goes through the y-axis, which in this case is (0,1.5), meaning that the y-intercept is 1.5 <em>(note: the y-intercept can also be found when x=0, for example (0,9).</em>

Hope this helped, good luck!

5 0
2 years ago
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Match the fraction/decimal with the percentage<br><br> MARKING BRIANIEST!
const2013 [10]

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7 0
2 years ago
What is 86.436 ÷ 12 show your work <br> 34.86 ÷ 4 show your work<br> 5.7 ÷ 15 show your work
liq [111]
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8 0
2 years ago
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1 and 16/24 + 1 and 21/24
AlexFokin [52]

Answer:

turn into improper fractions

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1*24+21=45

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24 goes into 85 three times with 13 left over so the answer is

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6 0
2 years ago
Yolanda has finished 45 percent of her homework and she has finished 27 problems. How many problems was Yolanda assigned
masya89 [10]
If 45 percent of the homework is only 27 problems, she needs to figure out this:

What is 47 percent of 60?
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47% x 60

Which is 27. 

So, Yolanda was assigned 60 problems.


6 0
2 years ago
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