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3 years ago

14

Shown here is a frequency distribution for the rise in tides at 30 selected locations in the U.S.Find the variance and standard

deviation

2 answers:

SSSSS [86.1K]3 years ago

8 0

It’s is going to be 15 since 30/2 equals 15

stiks02 [169]3 years ago

4 0

Answer: 15 since 30/2 equals 15
hope this helps:D

plz give me brainiest

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A line contains the points (82, −96) and (87, −86) .

olchik [2.2K]

The slope is 2

Hopes this helps in any sort of way

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3 years ago

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Write an equation perpendicular to the line y = 3x + 5 through the point (6, -5). State your answer as y=mx+b.

liubo4ka [24]

Answer:

y=(-1/3) x - 3

Step-by-step explanation:

A line that is perpendicular to it has a slope that is an opposite reciprocal, which in this case is -1/3. Now you use point slope form which is y-y1=m(x-x1) that would be y+5=-1/3(x-6). Distribute the -1/3 and get y+5= -1/3 x+ 2. Subtract 5 from both sides and get y=-1/3 x - 3

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3 years ago

Write the equation of a line that is perpendicular to y=7x−2 and passes through the point (14,8).(1 point) y=7x−90 y=10x−17 y=−1

True [87]

Answer:

$\huge\boxed{y=-\frac{1}{7}x+ 10}$

Step-by-step explanation:

In order to find the equation of this line, we need to note two things.

A) The slope of two lines that are perpendicular will be opposite reciprocals (that is, multiplying them gets us -1.)
B) We can substitute a point inside an incomplete equation to try and find a missing value.

So first, let's find the opposite reciprocal of 7 which will be the slope to this equation.

<u>Reciprocal of 7:</u> $\frac{1}{7}$
<u>Opposite of </u> $\frac{1}{7}$ : $-\frac{1}{7}$

So the slope of this line will be $-\frac{1}{7}$ . The y-intercept will change, and we can substitute what we know into the equation $y=mx+b$ .

$y = -\frac{1}{7}x+b$

Now, we can substitute a point on the graph (14, 8) into this equation to find b.

$8 = -\frac{1}{7} \cdot 14 + b$
$8 = -\frac{14}{7} + b$
$8 = -2 + b$
$b = 10$

Now that we know the y-intercept, we can finish off our equation by plugging that in.

$y = -\frac{1}{7}x + 10$

Hope this helped!

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3 years ago

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What is the measure of <br> a) 264°<br> b) 132°<br> c) 71°<br> d) 66°

Yuki888 [10]

The answer is 132° because there angle CDE is 87° so you know it's more of that. And, 264° is way too wide.

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4 years ago