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lord [1]
3 years ago
11

Two boats started to move towards each other from two boat stations, located 30 miles apart. One boat moved at a speed of 3 mile

s per hour, the other moved twice as fast. How soon will the boats meet?
Mathematics
1 answer:
madam [21]3 years ago
5 0

Answer:

The boats will meet in 3.33 hours.

Step-by-step explanation:

A(t) = B(t)

3t = 30 - 6t

9t = 30

t = \frac{30}{9}

t = 3.33

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A student scored 66 points on his Psychology 101 midterm. If the average of his midterm and final must be between 78 and 90 incl
Paul [167]

Answer:

range of scores on final exam student get  B is 90 to 100

Step-by-step explanation:

given data

Psychology 101 score = 66

average of his midterm = between 78 and 90

maximum = 100 points

to find out

range of scores on final exam student get  B

solution

we consider here lowest marks need in final = x

so average at two marks should be

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range of scores on final exam student get  B is 90 to 100

3 0
3 years ago
Complete the table with the number of sit-ups you have to do sunday so that the mean number of sit-ups per day is 100
marissa [1.9K]

The mean is the average of the numbers.

It is easy to calculate: add up all the numbers, then divide by how many numbers there are.

Let the number of sit-ups you have to do Sunday be x. Then the sum of all sit-ups is

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Answer: 175 sit-ups

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