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xeze [42]
3 years ago
7

20 points, Thanks to whoever helps! (and brainliest)

Mathematics
1 answer:
damaskus [11]3 years ago
4 0

Answer:

To find a 20 percent tip quickly, first find 10%, and then multiply it by 2.

Step-by-step explanation:

To find 10%, move the decimal 1 place to the left. So 10% of 53.82 is 5.382. Let's round that to 5.4 to simplify. Multiply it by 2 to get to 20% which is 10.8 and round to the nearest dollar to make $11.

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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)

7 0
3 years ago
Plsss Help!! Will mark brainiest!! Due soon!!
Tom [10]

Answer:

(10, 8) is the distance.

Step-by-step explanation:

The x's are 10 points away from each other and y's are 8 points away from each other.

By the way, there is no second picture.

Sorry if I'm wrong. I might be more helpful if you upload the second picture.

7 0
3 years ago
Read 2 more answers
Log x+log7=log 42 solve please
viva [34]
Log x+ log 7= log 42
log x=log 42 - log 7
log x=log 42/7                [  log a -  log b= log (a/b)   ]
log x= log 6

therefore:
x=6

Answer: x=6
3 0
3 years ago
Pense un numero lo multiplique por 7 al resultado le sume 4 obtube 32
irina [24]
7x+4=32
7x=28
X=4
Creo que así se ase
5 0
3 years ago
The lunch lady has 12 pounds of lasagna left over.
bogdanovich [222]

Answer:

12

Step-by-step explanation: if she has 12 pounds lasagna and make 1 pounds she can make 12 pounds for 12 people? hope this help you ;]

5 0
3 years ago
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