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Evgen [1.6K]
3 years ago
5

−5x+4y=38 −x+2y=10 solve by elimination

Mathematics
1 answer:
tatyana61 [14]3 years ago
8 0

Answer:

(-6, 2)

Step-by-step explanation:

-5x + 4y - 38 = 0 (1) | -x +2y - 10 = 0 (2)

First i multiply the 2nd equation by -5, because i want the magnitude of the x coefficient to be the same but with opposite signs, because when i'll add the equations the x's are going to cancel.

(2) * (-5):

5x - 10y + 50 = 0 (2')

(1) + (2'):

-5x + 4y - 38 + 5x - 10y + 50 = 0

-6y + 12 = 0

y = 2

Use the second equation, before multiplying to find the x - solution.

-x + 2(2) - 10 = 0

-x + 4 - 10 = 0 | add 'x'  to both sides

x = -6

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Sam had a savings bond that earned 7% interest every year. She started with $250 in the bond. How much money will she have in th
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4 0
3 years ago
I thought this was much more easier for you! :)
monitta
Problem 1)

The base of the exponential is 12 which is also the base of the log as well. The only answer choice that has this is choice B.

======================================================================
Problem 2)

log(x) + log(y) - 2log(z)
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Problem 3)

log[21/(x^2)]
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4 0
3 years ago
B. , using the<br> Pythagorean Theorem,<br> show that.<br> C. Solve for X
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X=20
WORK:

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3 years ago
I need a little help. (The question is on the screenshot by the way)
vagabundo [1.1K]

Answer:

45

Step-by-step explanation:

the answer iud D

7 0
2 years ago
Read 2 more answers
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