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Rom4ik [11]
3 years ago
14

Solve 3x-2y=2; -5x+5y=-10 by elimination

Mathematics
2 answers:
never [62]3 years ago
5 0

Answer:

x=−2 and y=−4

GenaCL600 [577]3 years ago
4 0

Answer:

x = -2 y = -4 or (-2,-4)

Step-by-step explanation:

-5x+5y=-10

3x-2y=2

Choose one variable to eliminate (We'll choose y)

(-5x+5y=-10)2 -> -10x+10y=-20

(3x-2y=2)5 ->       15x-10y=10

The -10 y cancels the 10y, and we combine the terms

5x = -10

Divide both sides by 5

x = -2

Back to -5x+5y=-10

Substitute the x with -2

-5(-2) + 5y = -10

10 + 5y = -10

Move the constant to the other side

10 + 5y = -10

-10           -10

5y = -20

Divide both sides by 5

y = -4

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5 0
4 years ago
Read 2 more answers
"The product of two numbers is 169. If the L.C.M. of these numbers is 13, find their H.C.F. "
umka21 [38]

Answer:

13

Step-by-step explanation:

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3 years ago
At CD Shack, all used CDs are the same price. Jesse spent $54 and Mimi spent $66 on used CDs. What is the most each used CD coul
Alinara [238K]
Hey there
__________
The correct answer is
Whatever each CD costs, what each person paid is that cost times the number of CDs purchased (no sales tax for this problem).
So, the price of one CD is a factor of $66 (a number of $ that divides $66 evenly).
In theory, it could be $1, $2, $3, $6, $11, $22, $66.
It could even be $0.50, $0.25, $0.20, $0.10, $0.05,...
Also, the price of one CD must be a factor of $54. such as $54,$27,$18,$9,$6,$3,$2,$1,... .
You are looking for the most that price could be.


The grew greatest price that is in both lists is $6.

How can you make those lists?
You can start with the total price, then the price divided by 2, by 3, by whatever whole number you can divide it.

Otherwise, you could find the greatest common factor of 66 and 54
from the prime factorization of both numbers.
___________________
Hope this helps you
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Answer:

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Step-by-step explanation:

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