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2 years ago

What is the value of x 2x+3y=45 x+y=10

1 answer:

Volgvan2 years ago

4 0

Assuming this is a system of equations, here is how to find x.

2x + 3y = 45
x + y = 10

Multiply x + y = 10 by 2 so you are able to use the elimination method.

2x + 3y = 45
2x + 2y = 20

Subtract.

y = 25

Now that we've found y, we can plug it in to find x.

x + 25 = 10

Subtract 25 from both sides.

x = -15

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Which graph represents the solution to the given system? (1 point) <br> Y=-3x+4 and y=2x-1

lakkis [162]

-3x + 4 = 2x - 1
5x = 5
x = 1

When x = 1, y = 1

I'm not sure about the graph, but I solved them simultaneously? If you meant which graph but forgot to upload a photo attachment, look where it crosses the Y axis. If it is 4, it will be the first equation, if it crosses at -1, it will be the second equation

8 0

2 years ago

A square with side x, is changing with time where x(t)=3t+1. What is the formula for the rate of change of the area of the squar

lawyer [7]

Answer:

A' = 6(3t +1)

Step-by-step explanation:

The area is the square of the side length, so ...

A = (3t +1)²

The derivative with respect to t is then

A' = 2(3t +1)·(3) = 6(3t +1)

If you like, you can multiply out the area expression first, then differentiate.

A = 9t² +6t +1

A' = 18t +6

This can be factored, if you like, to ...

A' = 6(3t +1)

5 0

2 years ago

Solve the system of linear equations by elimination.<br><br> −2x−5y=9<br> 3x+11y=4

goldenfox [79]

Answer:

x=-17, y=5. (-17, 5).

Step-by-step explanation:

-2x-5y=9

3x+11y=4

---------------

3(-2x-5y)=3(9)

2(3x+11y)=2(4)

---------------------

-6x-15y=27

6x+22y=8

-----------------

7y=35

y=35/7

y=5

3x+11(5)=4

3x+55=4

3x=4-55

3x=-51

x=-51/3

x=-17

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2 years ago

The variable y varies directly with the variable x.

Tomtit [17]

Answer:

I believe it is 21

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

You’re working in the sedan section of dean’s car dealership. A customer makes a down payment of 15% on a new car that costs $13

Shkiper50 [21]

Answer:

Convert 15 % to a decimal.

Then multiply 0.15 x 13450. That means the answer is $2,017.50

Please mark brainliest if this helped.

3 0

2 years ago