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podryga [215]
3 years ago
5

Solve using elimination. -7x – 5y = -4 7x + 9y = -4

Mathematics
1 answer:
Brut [27]3 years ago
5 0
-7x-5y=-47x+9y=-4

combine like terms to cross out the 7x
solve for y, to get -2
plug it back in to one of the equations and x is 2

y=-2
x=2
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The answer is (7, -26) for The second endpoint.  

We'll call the midpoint M. In order to find this, we must first note that to find a midpoint we need to take the average of the endpoints. To do this we add them together and then divide by 2. So, using that, we can write a formula and solve for each part of the k coordinates. We'll start with just x values.

(Ux + Vx)/2 = Mx

(Vx + 3)/2 = 5

Vx + 3 = 10

Vx = 7

And now we do the same thing for y values

(Uy + Vy)/2 = My

(Vy + 6)/2 = -10

Vy + 6 = -20

Vy = -26

This gives us the final point of (7, -26)

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Fed [463]

Answer:

The answer is 43 and 19 over 21

Step-by-step explanation:

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Given the function f(x) = -5|x + 11 + 3, for what values of x is f(x) =-12?
tino4ka555 [31]

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2.65 is how much for each mile, and the variable, x, represents the number of miles of the trip. so, we would do 2.65x to find out how much money you have to pay for the amounts of mile.

next, you would have to add the initial fee, which is 2.50. so 2.65x+2.50.

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3 years ago
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