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Keith_Richards [23]
3 years ago
12

What is the solution to the system of equations?

Mathematics
1 answer:
alukav5142 [94]3 years ago
6 0

Answer:

  (x, y) = (-4, 15)

Step-by-step explanation:

The two equations have the same coefficient for y, so you can eliminate y by subtracting one equation from the other. Here the x coefficient is largest for the first equation, so it will work best to subtract the second equation.

  (3x +y) -(2x +y) = (3) -(7)

  x = -4 . . . . . . . . simplify

Now, we can find y by substituting this value for x.

  2(-4) +y = 7

  y = 7 +8 = 15 . . . . . add 8 to both sides of the equation

The solution is (x, y) = (-4, 15).

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Find the midpoint of the line segment whose endpoints are (3, 10) and (7, 8).
Stels [109]

Answer:

Option 2 is correct.

Step-by-step explanation:

Given the coordinates of lines segment (3, 10) and (7, 8). we have to find the mid-point of given line segment.

Mid-point formula states that if (x_1,y_1) and (x_2,y_2) are the coordinates of end points of line segment then the coordinates of mid-point are

(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

∴ Coordinates of mid-point of line segment joining the points          (3, 10) and (7, 8) are

(\frac{3+7}{2},\frac{10+8}{2})=(\frac{10}{2},\frac{18}{2})=(5,9)

Hence, option 2 is correct.

6 0
3 years ago
Read 2 more answers
1. Shay found that she hit the bull's-eye when throwing darts 2/10 times. If she
viva [34]
<h2>Answer:</h2><h2>If she  continues to throw darts 75 more times, she could predict to hit the </h2><h2>bull's-eye 15 times.</h2>

Step-by-step explanation:

Shay found that she hit the bull's-eye when throwing darts \frac{2}{10} times = \frac{1}{5}.

In five times, she will hit the dart once.

If she  continues to throw darts 75 more times,

the probability that she will hit the bull's eye =  \frac{1}{5} (75) = 15 times.

If she  continues to throw darts 75 more times, she could predict to hit the

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6 0
3 years ago
the human eyeball is a sphere with a surface area of 20 square cm. find the approximate radius of the human eyeball.
guapka [62]

Answer:

1.26 corect answer

Step-by-step explanation:

the surface area of a sphere is 4*pi*r^2  

so r is sqrt(20/pi) which is sqrt(1.59) = 1.26

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3 years ago
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Answer:

x = -1

Step-by-step explanation:

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3 years ago
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Help this is literally due tomorrow​
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This is a trick question. They eat 1/3 of the gallons given. Multiply

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2 years ago
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