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Harman [31]
2 years ago
12

Simplify by combining like terms.1. -5a - 4a + b​

Mathematics
1 answer:
Bess [88]2 years ago
3 0
-9a+b final answer to it
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lina2011 [118]
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Step-by-step explanation:

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6 points
kodGreya [7K]

Answer:

y=-2\,(x+3)^2-3

Step-by-step explanation:

Notice that they are asking you to write the equation of the parabola in vertex form, that is using the coordinates of the vertex (x_v,y_v) in the expression:

y-y_v=a\,(x-x_v)^2\\y=a\,(x-x_v)^2+y_v

we can start by directly replacing the given vertex coordinates (-3, -3) in the expression, and then using the extra info on the point the parabola goes through in order to find the parameter a:

y=a\,(x-x_v)^2+y_v\\y=a\,(x+3)^2+(-3)\\y=a\,(x+3)^2-3\\-5=a\,(-2+3)^2-3\\-5=a\,(1)-3\\a=-5+3\\a=-2

So, now we can write the full expression for the parabola:

y=a\,(x+3)^2-3\\y=-2\,(x+3)^2-3

8 0
3 years ago
Find the circumference of the given circle 11 ft
nasty-shy [4]

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69.12

Step-by-step explanation:

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mash [69]
Variables are symbols that are used to represent a number in an expression or equation. 

There's one word phrase here, and it's answer is: c*3

If you need help with another one, just let me know! :)
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