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3 years ago

Find (x.y). y=6x-11 and -2x-3y=-7

Mathematics

1 answer:

mezya [45]3 years ago

7 0

(-1.3,-18.8)

you would start by substituting y=6x-11 into -2x-3y=-7

so it would look like

-2x-3(6x-11)=-7

once you solve for x you would then take the x value of -1.3 and put it into the equation y=6x-11 so it would look like this

y=6(-1.3)-11

which would get you y=-18.8

to check you would put both the x and y value back into -2x-3y=-7 and boom answer

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Answer:

189

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3 years ago

2 _ x -7=11 5 whats the answer

ZanzabumX [31]

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2 years ago

On the graph below are three points X, Y, and Z. Write the coordinates for the given dilation.

Julli [10]

ANSWER

$( - \frac{3}{2} , - 1)$

EXPLANATION

From the graph, the coordinates of Y are:

$(3,2)$

We want to find the image of this point after a dilation by a scale factor of -½ about the origin.

The rule for the dilation is :

$(x,y)\to( - \frac{1}{2} x, - \frac{1}{2} y)$

To find the coordinates of Y', we plug the coordinates of Y.

$Y(3,2)\to \: Y'( - \frac{1}{2} (3), - \frac{1}{2}(2) )$

$Y(3,2)\to \: Y'( - \frac{3}{2}, - 1)$

The first choice is correct.

6 0

3 years ago

What is 34% written as a ratio?

ZanzabumX [31]

34% written in decimal form is .34 (by moving the decimal 2 places left).

.34 written as a fraction is 34/100. Reduce the fraction by dividing numerator and denominator by 2 to get 17/50. The ratio is 17:50

5 0

3 years ago

Which of the following points could be the initial point of vector v if it has a magnitude of 10 an the terminal point (-1,5)?

Eddi Din [679]

Let the initial point of the vector be (x,y). Then the magnitude of the vector v can be written as:

$|v|= \sqrt{ (-1-x)^{2} + (5-y)^{2} }$

The magnitude of vecor v is given to be 10. So we can write:

$10= \sqrt{ (-1-x)^{2} + (5-y)^{2} } \\ \\ 100=(-1-x)^{2} + (5-y)^{2}$

Now from the given options, we have to check which one satisfies the above equation. That point will be the initial point of the vector.

The point in option d, satisfies the equation.

$100=(-1+7)^{2} +(5+3)^{2} \\ \\ 
100=36+64 \\ \\ 
100=100$

Thus, the answer to this question is option D

7 0

3 years ago