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3 years ago

(2,7);y= 1/2x -11 please im dying

Mathematics

2 answers:

goldenfox [79]3 years ago

7 0

y = 1/2 x to the second power - 11x + 27

Nuetrik [128]3 years ago

4 0

y = mx + b

"m" is the slope, "b" is the y-intercept

You need to find "m" and "b"

When lines are perpendicular, they have opposite slopes (the sign and number is flipped)

For example:

slope is 2

perpendicular line's slope is -1/2

slope is -4/5

perpendicular line's slope is 5/4

The given line's slope is 1/2, so the perpendicular line's slope is -2.

y = -2x + b

To find "b", you can plug in the point (2,7) into the equation

y = -2x + b

7 = -2(2) + b

7 = -4 + b Add 4 on both sides

11 = b

y = -2x + 11

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Answer:

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Step-by-step explanation:

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y = x² + 16

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3 years ago

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3 years ago

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2 years ago

The figures are similar. Give the ratio of the perimeters and the ratio of the areas of the first figure to the second.

pickupchik [31]

Answer: first option.

Step-by-step explanation:

The ratio of the area of the triangles can be calculated as following:

$ratio_{(area)}=(\frac{l_1}{l_2})^2$

Where $l_1$ is the lenght of the given side of the smaller triangle and $l_2$ is the lenght of the given side of the larger triangle.

Therefore:

$ratio_{(area)}=(\frac{28}{32})^2=\frac{49}{64}$

It can be written as following:

$ratio_{(area)}=49:64$

The ratio of the perimeter is:

$ratio_{(perimeter)}=\frac{l_1}{l_2}$

Where $l_1$ is the lenght of the given side of the smaller triangle and $l_2$ is the lenght of the given side of the larger triangle.

Therefore:

$ratio_{(perimeter)}=\frac{28}{32}=\frac{7}{8}$

It can be written as following:

$ratio_{(perimeter)}=7:8$

5 0

3 years ago