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Musya8 [376]
3 years ago
6

Identify whether each of the following equations has a unique solution, no solution, or infinitely many solutions.

Mathematics
2 answers:
balu736 [363]3 years ago
5 0

Answer:

A.

Step-by-step explanation:

erastova [34]3 years ago
4 0
I’m pretty sure the answer is A
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Multiply each equation by a constant that would help to eliminate the y terms.
Zinaida [17]

Answer:

Therefore the required resulting equation is

6x-15y=-63\\-15x+15y=90

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90

Step-by-step explanation:

Given:

2x-5y=-21         ......................Equation ( 1 )

3x-3y=-18         ......................Equation ( 2 )

To Find:

Expression after multiplying to eliminate y term,

Solution:

So to eliminate 'y' term we need to multiply equation 1 by a constant 3 and equation 2 by a constant -5,  such that equations  becomes

3(2x-5y)=3\times -21\\\\6x-15y=-63 .....( 1 )

-5(3x-3y)=-5\times -18\\\\-15x+15y=90  .....( 2 )

so now by adding new equation one and two we can eliminate y term that means -15y and +15y will get cancel,

Therefore the required resulting equation is

6x-15y=-63\\-15x+15y=90

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90

3 0
3 years ago
Read 2 more answers
Given that f(x)=x/2+5,<br> a)find f(2)<br> b)find f^-1(x)<br> c)find f^-1(5)
Aleks04 [339]
A) 6
b) x/f
c) 5/f

Mark brainliest please


Hope this helps you
8 0
2 years ago
What percent of 21 is 7?
prohojiy [21]
33 percent. 

7/21 = 0.3333333
7 0
2 years ago
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Please help out, using your knowledge of equilateral and isosceles triangles, find the value of x
alukav5142 [94]

Answer:

I think the other angles are 40 degrees excpet the "x" which is 100 also

Step-by-step explanation:

5 0
3 years ago
Evaluate x^2 − 4x + 5, when x = − 3
Gnom [1K]

Answer:

\huge\boxed{26}

Step-by-step explanation:

\sf x^2-4x+5\\Given \ that \ x = -3\\(-3)^2-4(-3)+5\\9+12+5\\26

3 0
3 years ago
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