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Nata [24]
3 years ago
10

Use linear combination method to solve this systemof equations. What is the value of x?

Mathematics
1 answer:
lys-0071 [83]3 years ago
7 0

Using the linear combination method, we can add 3x+7y=31 and -3x-2y=-1 together, which makes 5y=30.


Just divide both sides by 5, and your answer will be y = 6.



To solve for x, just substitute 6 in y in either equation and solve for x:


-3x-2(6)=-1\\ -3x-12=-1\\ -3x=11\\ x=-\frac{11}{3} =-3\frac{2}{3}



In short, the correct answer is B. -3 2/3

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Ludmilka [50]

Answer:

1/2 mile

Step-by-step explanation:

(1/8)*4 = 1/2 mile

6 0
3 years ago
Read 2 more answers
How to solve for x 2+9x^2=6
juin [17]

Answer:

The answer is : 2/3

Step-by-step explanation:

2+9x^2=6

9x^2 = 6 - 2

9x^2 = 4

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x = √(4/9)

x = 2/3

4 0
3 years ago
In circle L, points E and F lie on the circle such that E, F and L are not collinear. If LE, LF and EF are drawn then which of t
frozen [14]

Answer:

<u>option (2) it is and isosceles triangle. </u>

Step-by-step explanation:

In circle L, points E and F lie on the circle such that E, F and L are not collinear

If LE, LF and EF are drawn

So, LE = EF = the radius of the circle L

So, LEF is an isosceles triangle.

The answer is option (2) it is and isosceles triangle.

8 0
3 years ago
The average of 3 of your quiz grades are 17 points. Two of your quizzes is 14 and 19 points. Write and solve an equation to find
dsp73
(17*3) --- to find the total points of the 3 quizzes
17*3=51
the third quiz grade=51-14-19=18
hope this helps
8 0
3 years ago
At 2pm the level of the water in the pool was 10 feet. At 6pm the level of water was 2 feet. Find the constant rate of the water
adelina 88 [10]
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The time changed by 4 hours (6-2), and the level of the pool changed by -8 feet (2-10). Diving the feet by the hours to get the rate of decreasing depth, we find that the rate equals -2 feet/hour.
7 0
3 years ago
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