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Cloud [144]
3 years ago
9

Solve 3x – ly= 11 and -2x – 4y=-26 by elimination

Mathematics
1 answer:
Ede4ka [16]3 years ago
7 0

Answer:

(5, 4 )

Step-by-step explanation:

Given the 2 equations

3x - y = 11 → (1)

- 2x - 4y = - 26 → (2)

Multiplying (1) by - 4 and adding to (2) will eliminate the y- term

- 12x + 4y = - 44 → (3)

Add (2) and (3) term by term to eliminate y

- 14x + 0 = - 70

- 14x = - 70 ( divide both sides by - 14 )

x = 5

Substitute x = 5 into either of the 2 equations and solve for y

Substituting into (1)

3(5) - y = 11

15 - y = 11 ( subtract 15 from both sides )

- y = - 4 ( multiply both sides by - 1 )

y = 4

solution is (5, 4 )

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8 0
4 years ago
last year 950 people attended a towns annual parade. this year 1520 people attended. what was the percent increase in attendance
pogonyaev
1520-950/950 x 100

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60%

5 0
3 years ago
Read 2 more answers
Find the missing probability.
Westkost [7]

The value of the missing probability is:

P(A) = 1/5

So the correct option is D.

<h3>How to find the missing probability?</h3>

First, we know that:

P(A∩B) = probability that events A and B are true = 3/100

And we also know that:

P(B|A) = probability that event B is true given that event A is true = 3/20

Here we have the rule:

P(A∩B) = P(B|A)*P(A)

Replacing the first two:

3/100 = (3/20)*P(A)

Solving for P(A), we get:

(3/100)*(20/3) = 1/5 = P(A).

So we conclude that the correct option for the missing probability is the one in option D.

If you want to learn more about probability:

brainly.com/question/25870256

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4 0
2 years ago
How to do this question?
4vir4ik [10]
She has 3 tops and 3 bottoms if you multiply them you'll get 9. if you do 1,2, & 3 for tops and a, b, & c for bottoms to find the different ways on how she can wear it it'll still be 9. 

1     2     3
a     b     c

1a   2a   3a
1b   2b   3b
1c   2c   3c

8 0
3 years ago
Find the length between each pair of points (-1, 6) (7, 2)
Alexeev081 [22]

Answer:

\sqrt{80} or 4\sqrt{5}

Step-by-step explanation:

Using the distance formula:

d=\sqrt{(7-(-1))^2+(6-2)^2}=\sqrt{8^2+4^2}=\sqrt{64+16}=\sqrt{80}=4\sqrt{5}

Hope this helps!

8 0
3 years ago
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