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3 years ago

Totsaken sold half of his comic books and bought ten more. He now has 40. With how many did he begin?

Mathematics

2 answers:

AURORKA [14]3 years ago

8 0

The answer is 60 because

40-10*2=60

hope it helps

julia-pushkina [17]3 years ago

6 0

Okay, so first off, take ten away from 40. That gives you 30. Then, if you double that, it gives you 60. So, you can do half of 60 to get 30, and then add ten to get 40. So, he began with 60.

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7 0

3 years ago

Which of the answer choices could be the one missing data item for the following set, if the mode is 12?

crimeas [40]

Answer:

Step-by-step explanation:

first of all, what is mode: it is the highest occuring number in a set of numbers.

now since 12 is supposed to be the mean and it occurs twice but 9 also occurs twice so for 12 to be the mode, we must add one more 12.

therefore the answer is 12

8 0

3 years ago

Read 2 more answers

The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 200 people.

OLga [1]

Answer:

The z-distribution should be used for this problem.

Step-by-step explanation:

The population distribution is assumed to be normal. Which distribution to use?

If we have the standard deviation for the sample, we use the t-distribution.

If we use the standard deviation for the population, we use the z-distribution.

There is a known standard deviation of 2.2 minutes.

This means that 2.2 is the population standard deviation, and thus, the z-distribution should be used for this problem.

4 0

3 years ago

A specific automotive part that a service station stocks in its inventory has an 8% chance of being defective. Suppose many cars

mylen [45]

Answer:

6.23% probability that the fourth part retrieved from stock is the first defective

Step-by-step explanation:

For each part, we have that:

8% probability of being defective.

100-8 = 92% probability of not being defective.

The parts are independent of each other.

What is the probability that the fourth part retrieved from stock is the first defective?

The first three work correctly, each one with a 92% probability.

The fourth is defective, with an 8% probability.

P = 0.92*0.92*0.92*0.08 = 0.0623

6.23% probability that the fourth part retrieved from stock is the first defective

3 0

3 years ago

Manuel is filling water balloons at a constant rate of 3 water balloons per minute. With the given information, which of these s

Gnesinka [82]

<span>Okay. Well it's C. 1/2 hour is 30 mins, so 30 times 3 is 90. Just as the answer states, 90 water balloons filled after 1/2 of an hour. </span>

6 0

3 years ago