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AlexFokin [52]
3 years ago
8

Solve using elimination: x = y and 3x + 7y = 10

Mathematics
1 answer:
RUDIKE [14]3 years ago
5 0
3(1) + 7(1) =10
x=1
y=1
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Please help! Don't answer if your not sure.
gavmur [86]

Answerthats good

Step-by-step explanation:

i will answer

5 0
3 years ago
What is the value of x in the equation 3-2x--15x?<br><br> 6<br> 2<br> 2<br> 6
Wittaler [7]

Consider the given equation is 3-2x=15 and one of the 6 in the options is -6.

Given:

The equation is

3-2x=15

To find:

The value of x.

Solution:

We have,

3-2x=15

Subtracting 3 from both sides, we get

3-2x-3=15-3

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Divide both sides by -2.

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Therefore, the value of x is -6.

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3 years ago
Allied Plumbing charges $45 per service call plus $30 per hour. Ajax Plumbing charges $60 per service call plus $25 per hour. Ho
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3 years ago
Veronica has been saving dimes and quarters she has 110 coins in all and the total value is 18.50 how many dimes and quarters do
Lady_Fox [76]

This problem can be solved by the chicken rabbits method or you can just do simple algebra.

I.) Chicken and rabbits method

First assume all 110 coins are dimes and none are quarters.

We will have a total value of 11 dollars

Now for each dime we switch out for a quarter, we adds 15 cents to the total value.

18.50-11=7.50 dollars

There are 750/15=50 group of 15 cents in the 7 dollars and 50 cents.

This also meant that we need to switch out 50 dimes for 50 quarters.

So we have 50 quarters.

That first method is very good and very quick once you get the hang of it, now I'm going to show you the algebraic way to solve this.

Let's say there are x dimes and y quarters.

Set up equation

x+y=110

10x+25y=1850

Now solve multiply first equation by 10

10x+10y=1100

subtract

15y=750

y=50

Now we set the numbers of quarters to y so the answer is 50 quarters.

I personally recommend using algebra whenever you can because the practice is very important and you will eventually get really fast at setting up and solving equations. The first method is faster in this case but the second is more generalize, hope it helps.

6 0
3 years ago
The proof that triangle ABC is congruent to triangle CDA is shown. given a AB is parallel to cd and BC is parallel to DE prove t
Tresset [83]

Answer:

D) SSS congruence theorem

Step-by-step explanation:

Edge 2021

3 0
3 years ago
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