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3 years ago

Can anyone help me ????? Please

Mathematics

2 answers:

valina [46]3 years ago

6 0

9.42

((x)(y) means x times y)

circumference=2 times pi times radius or 2(πr) and we notice that we can play with the distributive property and get 2(πr)=(2)(π)(r)=(π)(2r) and 2r or twice of r=diameter so 2πr=πdiamater

so
9.42=π(diameter)
divide both sides by π aproxamated in this question to be 3.14
9.42/3.14=diameter=3
the diameter is 3 feet

vredina [299]3 years ago

4 0

The diameter is 3 feet.
$9.42/3.14=3$
So,the answer is 3 feet.

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Answer:

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Step-by-step explanation:

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3 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:

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3 years ago

Write an equation of the line below.

Dafna11 [192]

Answer:

$\large\boxed{y=4x+3}$

Step-by-step explanation:

The slope-intercept form of an equation of aline:

$y=mx+b$

m - slope

b - y-intercept

The formula of a slope:

$m=\dfraxc{y_2-y_1}{x_2-x_1}$

From the graph we have the points:

(-2, -5)

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Calculate the slope:

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Put the value of the slope and the y-intercept to the equation of a line:

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3 years ago

Find the x- and y- intercepts if the line that passes through the given points (-6,-6),(4,-2).

Paul [167]

Answer:

The x-intercept would be 9 and the y-intercept would be -18/5

Step-by-step explanation:

In order to find this we need to first find the slope. To do that we use the two points and the slope equation.

m (slope) = (y2 - y1)/(x2 - x1)

m = (-2 - -6)/(4 - -6)

m = 4/10

m = 2/5

Now that we have the slope, we can use that and either point to find the equation of the line in standard form.

y - y1 = m(x - x1)

y + 6 = 2/5(x + 6)

y + 6 = 2/5x + 12/5

-2/5x + y + 6 = 12/5

-2/5x + y = -18/5

-2x + 5y = -18

Now that we have this, we can find the intercepts through using 0s. First, we put a zero in for y to find the x intercept.

-2x + 5y = -18

-2x + 5(0) = -18

-2x = -18

x = 9

Therefore the x intercept is 9.

We find the y-intercept by doing the opposite. We put a 0 in for x.

-2x + 5y = -18

-2(0) + 5y = -18

5y = -18

y = -18/5

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3 years ago

Read 2 more answers

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ElenaW [278]

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4 1/2hours

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3 years ago