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pshichka [43]
3 years ago
15

Simplify 7x²+3x-5x²-10x

Mathematics
1 answer:
solmaris [256]3 years ago
3 0

Answer:

2x²-7x

Step-by-step explanation:

7x²-5x²=2x²

10x-3x=7x

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3 years ago
Find center,foci, and vertices of ellipse (x+3)^2/21+(y-5)^2/25=1
sasho [114]
I don't know if we can find the foci of this ellipse, but we can find the centre and the vertices. First of all, let us state the standard equation of an ellipse. 

(If there is a way to solve for the foci of this ellipse, please let me know! I am learning this stuff currently.) 

\frac{(x-x_{1})^2}{a^2}+ \frac{(y-y_{1})^2}{b^2}=1

Where (x_{1},y_{1}) is the centre of the ellipse. Just by looking at your equation right away, we can tell that the centre of the ellipse is: 

(-3,5)

Now to find the vertices, we must first remember that the vertices of an ellipse are on the major axis. 

The major axis in this case is that of the y-axis. In other words, 

b^2>a^2 

So we know that b=5 from your equation given. The vertices are 5 away from the centre, so we find that the vertices of your ellipse are: 

(-3,10)
 & (-3,0)

I really hope this helped you! (Partially because I spent a lot of time on this lol) 

Sincerely,

~Cam943, Junior Moderator
6 0
4 years ago
4 mi = ___ ft <br> answer please!!
Tpy6a [65]

Answer:

21120

Step-by-step explanation:

1 mile = 5280 feet

5280 feet * 4 = 21120

4 0
3 years ago
How do you explain how to find the volume of a cylinder
N76 [4]
The formula is V=Bh You'd get the base (it's a circle so you'd have to do A=pie*radius square) Once you find the base, you mutliply it by the height
5 0
3 years ago
A boy pushes on box of mass 43 kg and it moves at an acceleration of 8.6m/s
madam [21]
If you want to work out the force then F=MA, therefore 43*8.6=369.8 Newtons
7 0
4 years ago
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