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kow [346]
3 years ago
15

when we ordered pizza, 75% of the class wanted pepperoni. of 21 people wanted pepperoni, how many people are in the class

Mathematics
2 answers:
Anon25 [30]3 years ago
8 0

Answer:

28

Step-by-step explanation:

VikaD [51]3 years ago
3 0

Answer:

28 people

Step-by-step explanation:

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Without his pencil or calculator, Joey knows that 2x³+3x²− 1 = 0 has at least one real solution. How does he know?
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Answer: Find the discriminant

Check explanation

Step-by-step explanation:

b^2-4ac

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3 years ago
#10: find angle x and y!<br> Im struggling so much with this question please help a gurl out!
hjlf

Answers:

x = 100

y = 25

==============================================================

Explanation:

Angle y and the 25 degree angle are corresponding angle. Because the lines are parallel, this means that y = 25

Check out the attached image. Using a red pen, I extended one of the lines to form a triangle. From the alternate interior angle theorem, we know that one of the angles of the triangle is 75 degrees (alternate interior angles are congruent). Again this stems from the fact that the lines are parallel.

I've also introduced the variable z to help find x. The angles x and z add up to 180 degrees since they form a straight line. So we need to find z before we can find x.

The triangle's angles 25, 75, z add up to 180. Let's solve for z

25+75+z = 180

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z = 180-100

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Use this to find x

x+z = 180

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