3 years ago

My teacher wrote the answer on the right but he wants me to show how he did it

Mathematics

1 answer:

Airida [17]3 years ago

4 0

865 is the answer of this question...

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frez [133]

Answer: B

Step-by-step explanation:

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Suppose two angles in a coordinate plane, one measuring 80° and the other measuring 160°, were both rotated 180° about the origi

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C because I just took it

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50 POINTS AGAIN<br> and I will give brainliest

Novosadov [1.4K]

Answer:

apple = 4

blackberry =5

Step-by-step explanation:

Let a = apple pie cost

b =blackberry pie cost

4a +9b = 61

7a +6b = 58

Multiply the first equation by 7

7(4a +9b) = 61*7

28a +63b = 427

Multiply the second equation by -4

-4(7a +6b) = 58*-4

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28a +63b = 427

-28a -24b = -232

-----------------------------

0a +39b =195

Divide each side by 39

39b/39 = 195/39

b= 5

Now we need to find a

4a +9b = 61

4a +9(5) = 61

4a +45 = 61

4a+45-45 =61-45

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Divide by 4

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3 years ago

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The area of a circle is 9pi cm². Find its radius. <br>Please do this question with full solution:)

kirill115 [55]

Answer:

3 cm

Step-by-step explanation:

The formula for the area of a circle is:

$A = \pi r^2$

Where "r" represents the radius of the circle. We can substitute the given value for Area into the equation to solve for the radius.

<h3>Solve for Radius</h3>

$A=\pi r^2\\9\pi = \pi r^2$

Divide both sides by π

$9=r^2$

Take the square root of both sides

$\sqrt9=\sqrt {r^2}\\r=3$

The radius of the circle is 3 cm.

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2 years ago