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4 years ago

Please Help???!!! I'm a 7th grader and need help! will give 20 points!

Mathematics

1 answer:

Ganezh [65]4 years ago

5 0

Answer:

3. d= 20mm

4. r= 8 in

5. d= 14 mi

6. r= 11 yd

Step-by-step explanation:

Radius is half of diameter.

Example:

What is the diameter of a circle with a radius of 4?

If r = 4, d = 8

Do radius times 2.

Example 2:

What is the radius of a circle with a diameter of 10?

D = 10, so r = 5

Do diameter divided by 2.

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3 years ago

Read 2 more answers

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marta [7]

Answer:

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6 0

3 years ago

Can someone please help me!!!

maksim [4K]

Answer:

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Step-by-step explanation:

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8 0

3 years ago

Write an equation of the line that passes through each pair of point y=mx+b

jarptica [38.1K]

$y=-\frac{2}{3}x+4$

Explanation

Step 1

find the slope

when yo know 2 points of a lines, P1 and P2, you can find the slope by using:

$\begin{gathered} \text{slope}=\frac{change\text{ in y}}{\text{change in x}}=\frac{y_2-y_1}{x_2-x_1} \\ \text{where} \\ P1(x_1,y_1) \\ P2(x_2,y_2) \end{gathered}$

then, let

P1(6,0)

P2(0,4)

replace

$\begin{gathered} \text{slope}=\frac{y_2-y_1}{x_2-x_1} \\ slope=\frac{4-0}{0-6}=\frac{4}{-6}=-\frac{2}{3} \end{gathered}$

Step 2

find the equation of the line,

$\begin{gathered} y-y_1=slope(x-x_1) \\ \text{replace} \\ y-0=-\frac{2}{3}(x-6) \\ y=-\frac{2}{3}x+\frac{12}{3} \\ y=-\frac{2}{3}x+4 \end{gathered}$

so , the equation of the lines is

$y=-\frac{2}{3}x+4$

where -2/3 is the slope, and 4 is the y-intercept

I hope this helps you

4 0

1 year ago

Solve the inequality and express your answer in interval notation. x^2- 8x+3<0

Papessa [141]

Solution:

A. $(-4-\sqrt{13},-4+\sqrt{13})$

Hope this helps!

7 0

2 years ago

Please Help???!!! I'm a 7th grader and need help! will give 20 points!​

Please Help???!!! I'm a 7th grader and need help! will give 20 points!