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jek_recluse [69]
3 years ago
12

Solve the system of equations using elimination.

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
4 0

Answer: B. (3,9)


Step-by-step explanation:

7x -5y = -24(times by -1)

–9x + 5y = 18

-2x=-6

X= 3

(Substitute 3 in)

-9(3)+5y=18

-27+5y=18

5y=45

Y=9


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Graph A line goes through the point (6,–2) and has a slope of –3. What is the value of a if the point (a,7) lies on the line?
3241004551 [841]

Answer:

The value of a is 3

Step-by-step explanation:

First you have to make an equation based on the point and slope that you were given. The formula for this is y-(y cordinate of point)=slope(x-x cordinate of slope)

y--2=-3(x-6), which simplifies to y+2=-3(x-6)

In (a,7), 7 is the y coordinate. We have to plug 7 in for the y in our equation.

7+2=-3(x-6),

Combine like terms on the left side to get to 9=-3(x-6)

Multiply out on the left to get 9=-3x+18

Subtract 18 from the left side to get -9=-3x

Divide both sides by negative 3 to get 3=x (remember x is a)

7 0
3 years ago
Help me on this question. would be nice if you could also graph it as well​
Gre4nikov [31]
Bro it definitely A I’m
Telling you
6 0
3 years ago
Can anyone solve this for me ? please
Firdavs [7]

Answer:

22

Step-by-step explanation:

5 0
3 years ago
Can i plz have some help with this
ddd [48]

Answer:

Option 2

x + 90 + 61 = 180

Step-by-step explanation:

x + 90 + 61 = 180

Supplementary angles

5 0
4 years ago
I need help please, I dont know how to do this
Oliga [24]

Answer:

Step-by-step explanation:

Odd numbers backwards - 9, 7, 5, 3

1 = -2+9=7

2 = -1+7=6

3 = 0+5=5

4 = 1 +3=4

3 0
3 years ago
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