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alekssr [168]
3 years ago
8

Can anyone help me on #7 and #8

Mathematics
2 answers:
Leno4ka [110]3 years ago
8 0
This is all you have to do.

nika2105 [10]3 years ago
8 0
See my picture reply.

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How to solve this system of equal: x+y+z=1;x^2+y^2+z^2=1
swat32

There are infinitely many solutions.

Algebraically, we can eliminate z and try to solve for x,y:

x+y+z=1\implies z=1-x-y

Then

x^2+y^2+(1-x-y)^2=1

\implies x^2+y^2+1-2x+x^2-2y+y^2+2xy=1

\implies x^2-x+y^2-y+xy=0

which is the equation of an ellipse.

5 0
3 years ago
sandra raised 15 dollars for pta and nita raised 45 dollars how many times as much money did nita raise as compared to sandra​
OlgaM077 [116]

Answer:

3 times (3x)

Step-by-step explanation:

Sandra raised 15 dollars.

Nita raised 45

45 divided by 15 is 3

3 * 15 = 45

7 0
2 years ago
Need help<br> Pleaseeeee
fomenos

Answer:

164 m^2

Step-by-step explanation:

You can think of the shaded area in different ways. One of the ways is the entire outer colored rectangle minus the area of the small white rectangle inside.

The large colored rectangle is 12 m by 15 m.

The inner rectangle is 8 m tall. The width is 12 m - 5 m - 5 m = 2 m

A = 12 m * 15 m - 2 m * 8 m

A = 180 m^2 - 16 m^2

A = 164 m^2

4 0
3 years ago
Read 2 more answers
Find the product.
IrinaK [193]
(2n+1)(2n-1)(n+5)
=(4n^2+2n-2n-1)(n+5)
=(4n^2-1)(n+5)
=4n^3-n+20n^2-5
4n^3+20n^2-n-5
4 0
2 years ago
(PLEASE HELP BRO THIS IS DUE TMR)
Sonbull [250]

Answer:

Hold on, our servers are swamped. Wait for your answer to fully load.

more ponits not fair

Step-by-step explanation:

jus beig ismapHold on, our servers are swamped. Wait for your answer to fully load.

6 0
2 years ago
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