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satela [25.4K]
3 years ago
11

Solve using elimination. 3x − 5y = 18 -10x + 5y = 10

Mathematics
2 answers:
olga55 [171]3 years ago
5 0

3x - 5y = 18 over

-10x + 5y = 10

Add them because the 5y's have the right symbols for us to add

-7x = 28

Divide

x = -4

Now you can plug in -4 for x in one equation, I would use the first equation!

3(-4) - 5y = 18

-12 - 5y = 18

Add 12

-5y = 30

Divide

y = -6

Your solutions are going to be:

x = -4

y = -6

To check your work plug x and y into one equation:

3(-4) - 5(-6) = 18

-12 + 30 = 18

18 = 18

Since 18 does equal 18 you know that your solution's work!

GalinKa [24]3 years ago
4 0
Yes that is the right answer
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3 years ago
Help pls (20 points it’s a lot please)
irga5000 [103]

Answer:

The amount he needs to pay = $ 650

Step-by-step explanation:

Area= h* (a+b/2)

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8 0
3 years ago
!!BRAINLIEST!! Is the opposite of I-5I 5?
Semenov [28]

Answer:

No. It is not. The opposite is -5

Step-by-step explanation:

I -5 I

The symbols; | | represents absolute value.

It gives the non negative value of that number irrespective of the sign of the number.

That is;

| -a | = a and | a | = a

So in this case;

| -5 | = 5

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4 0
3 years ago
An archer has $62 to spend on a new archery
sasho [114]

Answer:

5 more arrows

Step-by-step explanation:

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The archer can buy 5 more arrows.

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7 0
3 years ago
Tom volunteered 1 out of the last 12 days at the school store. Which shows the decimal form of this ratio?
OLEGan [10]

Answer:

0.0833...

Step-by-step explanation:

1 out of 12 can be rewritten as 1 divided by 12.

1 divided by 12 is 0.08333333...

I'm not sure how many places you want to round it to, but if you were to round it to the hundredths place you would get 0.08, and if you were to round it to the thousandths place you would get 0.083.

Hope this helps!

3 0
3 years ago
Read 2 more answers
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