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MA_775_DIABLO [31]
4 years ago
7

Find the solution to the equations. 2 x - y = -3 x + y = 0 (0, 0) (-1, 1) (1, -1)

Mathematics
1 answer:
Ghella [55]4 years ago
5 0

solution is (- 1, 1 )

given the 2 equations

2x - y = - 3 → (1)

x + y = 0 → (2)

add (1) and (2) term by term to eliminate the term in y

3x = - 3 ( divide both sides by 3 )

x = - 1

substitute x = - 1 in either of the 2 equations and solve for y

(2) : - 1 + y = 0 ( add 1 to both sides )

y = 1

solution is (- 1, 1 )


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Answer:

6 miles per gallon

Step-by-step explanation:

Given : An experimental vehicle was able to travel 3/8 miles on 1/16 gallon of water.

To Find: At this rate, what was the mileage in miles per gallon of water for this vehicle?

Solution:

Since An experimental vehicle was able to travel 3/8 miles on 1/16 gallon of water.

So, the mileage in miles per gallon of water for this vehicle:

\frac{\frac{3}{8}}{\frac{1}{16}}

{\frac{3}{8}*16

3*2

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3 years ago
Which of the following units would you use to measure the length of a blue whale
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3 years ago
Help plzzzzz.............
ludmilkaskok [199]

Answer:

a) 3 b) y = 3x + 11

Step-by-step explanation:

a)

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-2 - 2 / 7 + 5

-4/12 = -1/3

Now that we know the gradient of line AB is -1/3, take the opposite reciprocal of that to find the gradient perpendicular to line AB.

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b)

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7 0
3 years ago
Ryan and Marie had some marbles. if Ryan lost `15 marbles, he would have 4 times as many marbles as Marie. If Ryan lost 75 marbl
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Ryan's marbles   =  x
Marie has 4 times less marbles then Ryan would have if he lost 15 marbles (it means he would have x-15)
So, Marie marbles  =  (x-15):4
If Ryan lost 75 marbles (it means he would have x-75), he would have 1 1/2 times as many marbles as Marie.

We got an equation:                                  x-75=1\frac{1}2\cdot\frac{x-15}{4}

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Multiply both sides by 8:                            8x-8\cdot75=3\cdot(x-15)

                                                                  8x-600=3x-45

Add 600 and subtract 3x on both sides:    5x=555

Divide both sides by 5:                               x=111


Answer:    Ryan have 111 marbles.

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Step-by-step explanation:

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