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3 years ago

EASY MATH PLEASE HELP

Mathematics

1 answer:

Arlecino [84]3 years ago

3 0

Answer:

B) (-2, -4)

Step-by-step explanation:

the x-axis is the horizontal axis so (-2,4) reflected over it keeps the point two units away from the x-axis and 4 units away from the y-axis

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faith wants to use the formula c(f)= 5/9(f-32) to convert degrees to fahrenheit, f, to degrees celsius, c(f). if faith calculate

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4 years ago

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Svet_ta [14]

Answer:

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function 3

Step-by-step explanation:

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Kazeer [188]

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3 years ago

The ratio of the circumference of two circles is 3:2.What is the ratio of their area

Nezavi [6.7K]

The ratio of their area is 9/4

<h2>Explanation:</h2>

We use ratios to compares values. In this exercise, we are comparing the circumference of two circles, which is:

$3:2$

and we want to know what is the ratio of their area. Recall that the circumference of a circle is given by:

$C=2\pi r \\ \\ \\ Where: \\ \\ C:Circumference \\ \\ r:Radius \ of \ the \ circle$

If we define:

$C_{1}: \ Circumference \ of \ circle \ 1 \\ \\ C_{2}: \ Circumference \ of \ circle \ 2 \\ \\ r_{1}: \ Radius \ of \ circle \ 1 \\ \\ r_{2}: \ Radius \ of \ circle \ 2$

Then, the ratio of the circumference of two circles is 3:2 is:

$\frac{C_{1}}{C_{2}}=\frac{2\pi r_{1}}{2\pi r_{2}}=\frac{3}{2} \\ \\ \therefore \frac{r_{1}}{r_{2}}=\frac{3}{2}$

The area of a circle is given by:

$A=\pi r^2 \\ \\ A:Area \\ \\ r:Radius$

So the ratio of their area can be found as:

$\frac{A_{1}}{A_{2}}=\frac{\pi r_{1}^2}{\pi r_{2}^2} \\ \\ \\ A_{1}:Area \ of \ circle \ 1 \\ \\ A_{2}:Area \ of \ circle \ 2$

So:

$\frac{A_{1}}{A_{2}}=\frac{r_{1}^2}{r_{2}^2}=\left( \frac{r_{1}}{r_{2}} \right)^2 \\ \\ \frac{A_{1}}{A_{2}}=\left(\frac{3}{2}\right)^2 \\ \\ \boxed{\frac{A_{1}}{A_{2}}=\frac{9}{4}}$

<h2>Learn more:</h2>

Unit rate: brainly.com/question/13771948#

#LearnWithBrainly

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4 years ago

The sum of two numbers is 285. 75. The first number represents

Alex_Xolod [135]

Answer:

210

Step-by-step explanation:

the % is there to try to throw you off. all you have to do is subtract 285 by 75

which is 210

i believe thats all you do. hope this helps!

4 0

3 years ago