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Marizza181 [45]
3 years ago
15

At last month's trivia competition, 20 questions were about history and geography, and the other 35 questions were about pop cul

ture. This month, the number of history and geography questions increased by 15%, while the number of pop culture decreased by 20%.
Find the percent change in total number of questions from last month to this month.

A.
The total number of questions decreased by about 4%.
B.
The total number of questions increased by about 17.5%.
C.
The total number of questions increased by about 8%.
D.
The total number of questions decreased by about 7%.
Mathematics
1 answer:
valkas [14]3 years ago
8 0

Answer:

About 7% is the anwser i tried 4% and i got it wrong and it said 7 was correct

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yan [13]

Answer:

The sum of all the possible values for z that satisfy the above equation is -5.

Step-by-step explanation:

The given equation is

\frac{5}{z}-\frac{2z+4}{z+2}=-3

We need to find the sum of all the possible values for z that satisfy the above equation.

The given equation can be rewritten as

\frac{5}{z}-\frac{2(z+2)}{z+2}=-3

Cancel out common factors.

\frac{5}{z}-2=-3

Add 2 on both sides.

\frac{5}{z}-2+2=-3+2

\frac{5}{z}=-1

5=-z

Multiply both sides by -1.

-5=z

Only z=-5 satisfy the given equation.

Therefore the sum of all the possible values for z that satisfy the above equation is -5.

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Step-by-step explanation:


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Which equation is correctly setup to solve for x?
AURORKA [14]

The formula for the hypotenuse of a triangle is:

[a squared] plus [b squared] = c squared

a and b represent the two sides of the triangle.

You would have to square 8 and 4, add them, then take the square root of it to find the length of the hypotenuse.

<h2>The first equation is correct.</h2>
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Answer:

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Step-by-step explanation:

C(m) = 0.10m + 41

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45. A crew member on a boat releases a camera 2 feet above the surface of a lake. The
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Answer:

C. 4 feet below

Step-by-step explanation:

A crew member on a boat releases a camera 2 feet above the surface of a lake. That is +2 feet

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+2+(-6)

2-6

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