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3 years ago

Find x. A. 32 B. 8 C. 16 D. 24

Mathematics

1 answer:

MariettaO [177]3 years ago

8 0

Answer:

C. 16

Step-by-step explanation:

Set up a proportion. 12 over 8 equals 24 over x. Multiply 24 and 8 then you get 192 then divide that by 12 and you get x=16.

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Which is the equation of a line with the slope of -2 that passes through the point (-2,0)

pickupchik [31]

Y = -2x - 4

-2x is the slope and -4 is the y intercept.

6 0

3 years ago

Read 2 more answers

Find the digit that makes 3,80_divisible by 8.

CaHeK987 [17]

The answer would be B. 0. If you put 3,800 into a calculator and divide by 8 the answer should be 475

5 0

4 years ago

Read 2 more answers

Why is the answer B? Plz explain.

Ivanshal [37]

Step One

Develop a formula for the perimeter.

Argument

What you see is a semicircle going upwards and another one going downwards. Two semicircles =1 circle.

The "perimeter" [Circumfrence] of a whole circle = 2*pi*r

We are told that whatever you call this the perimeter is 8pi + 16

Step Two

Set up the equation

8pi + 16 = 2*pi*r + 4r Including the line connecting these two.

Step Three

Take out the common factors on the left and right.

8(pi + 2) = 2r(pi + 2) Divide both sides by pi + 2

8 = 2r Divide by 2

4 = r

Sorry. I didn't know the meaning of perimeter. Mathmate is perfectly correct.

6 0

3 years ago

In a chess tournament, each player is in one game with every other player. How many games will be played if there are 7 players

Elza [17]

You would first find out how many games one player plays. It is 4 games. then you would multiply that by 7 because there are 7 players. your answer is 28

6 0

3 years ago

A worn, poorly set-up machine is observed to produce components whose length X follows a normal distribution with mean 14 centim

Akimi4 [234]

Answer:

74.86% probability that a component is at least 12 centimeters long.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 14$