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3 years ago

3x-2y-7x+y can you explain how to do this please

Mathematics

1 answer:

konstantin123 [22]3 years ago

8 0

3x - 2y - 7x + y

Rearrange the terms

3x - 7x - 2y + y

Add like terms

-4x - y

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Likurg_2 [28]

Answer:

D. a line and a point not on that line

Step-by-step explanation:

That is how you determine a plane.

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4 years ago

NEED HELP ASAP ILL MAKE BRAINLIEST PLEASE HELP

nordsb [41]

Answer:

33% (B)

Step-by-step explanation

It increased by 150, and 150 is 1/3 of 450, so 33% Hope this helped! Good luck!

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3 years ago

The table shows the results of rolling a number cube, with sides labeled 1 through 6, several times.

Free_Kalibri [48]

Answer with Step-by-step explanation:

we are given a event of rolling as die several times:

Outcome: [1 2 3 4 5 6]

Number of times outcome occurred: [10 6 4 8 6 6]

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3 0

4 years ago

Read 2 more answers

Trisha and Byron are washing and vacuuming cars to raise money for a class trip. Trisha raised $38 washington 5 cars and vacuumi

pshichka [43]

Answer:

The amount they charged to wash a car is $6 and vacuum a car is $2.

Step-by-step explanation:

Given:

Trisha and Byron are washing and vacuuming cars to raise money for a class trip.

Trisha raised $38 washington 5 cars and vacuuming 4 cars.

Byron raises $28 by washing 4 cars and vacuuming 2 cars.

Now, to find the amount they charged to wash a car and vacuum a car.

Let the amount charged for washing a car be $x.$

And the amount charged for vacuuming a car be $y.$

So, the total amount Trisha raised:

$5x+4y=38.$ .......(1)

And, the total amount Byron raised:

$4x+2y=28.$

Now, to get the amount they charged to wash a car and vacuum a car we use elimination method:

$5x+4y=38\\4x+2y=28......\times 2$

$5x+4y=38\\8x+4y=56$

$-3x=-18$

$3x=18$

Dividing both sides by 3 we get:

$x=6.$

Amount charged to wash a car = $6.

Now, putting the value of $x$ in equation (1) we get:

$5(6)+4y=38.$

$5\times 6+4y=38$

$30+4y=38.$

Subtracting both sides by 30 we get:

$4y=8.$

Dividing both sides by 4 we get:

$y=2.$

Amount charged to vacuum a car = $2.

Therefore, the amount they charged to wash a car is $6 and vacuum a car is $2.

5 0

3 years ago

I don’t know how to do this ?

Alina [70]

All you need to do is draw the picture of what is happening

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3 years ago