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Greeley [361]
2 years ago
8

John has $55. He buy 6 books. Each book cost the same amount . He now has 10

Mathematics
2 answers:
Julli [10]2 years ago
8 0

Answer:Answer: $7.50

Step-by-step explanation:

$55-$10=$45  45/6=7.5

Step-by-step explanation:

amid [387]2 years ago
8 0

Answer:

7.5$ per book

Step-by-step explanation:

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If the measure of arc RT = 80 degrees and the measure of arc US = 40 degrees, what is the m<2?
tester [92]
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2 years ago
Please please helpppp.
padilas [110]

There are 3 ways of solving a simultaneous problem, substitution method, elimination method and Gauss-Jordan method. I'm gonna use the substitution method since it's easier and i think it would suit your level more.

First let's try solving for y since it's easier to start with.

Firstly we have to find an equation for x:

x-2y=2\\x-2y+2y=2+2y\\x=2+2y

Great, now we can use the substitution method to find the value of y using the first equation:

2x+3y=11\\2(2+2y)+3y=11\\4+4y+3y=11\\7y=7\\y=1

Now we know that y=1 we can solve the first equation we made:

x=2+2y\\x=2+2(1)\\x=4

And the answer is x=4 , y= 1\\(4,1)

Double check:

2x+3y=11\\2(4)+3(1)=11\\8+3=11\\11=11\\\\x-2y=2\\(4)-2(1)=2\\2=2

And that's our final answer! (4,1)

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Answer:

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Step-by-step explanation:

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