how to determine total amount of calls in a survey about response times for selected emergency services

four men working together can create a trench in 42 days. they begin the job but one man works only half days. How long will it take to complete the trench?

Factor the expression below. x2 - 4x + 4 A. 4 (x2 - x + 1) B. (x - 2) (x + 2) C. (x + 2) (x + 2) D. (x - 2) (x - 2)

5x-3x (26x-7x-28x) systems of equation

Alex will be x years old in 3 years how old his he now

A number is 1/7 of another number. the difference of the number is 18. find the numbers

At a party there are 25 students over age 21 and 15 students under age 21. you choose at random five of those over 21 and separately choose at random three of those under 21 to interview about attitudes toward alcohol.

On Earth, objects weigh 6 times what they weigh on the Moon. A robot weighs 96 pounds on Earth. What does it weigh on the Moon?

Marco borrowed $150 from his brother. He has paid him back 30% so far. How much money does Marco still owe his brother?

Is 57 and 40 relatively prime

If the product of two numbers is positive, which of the following expressions must be true? One of the factors was positive. One of the factors was negative. The factors had the same sign. The factors had different signs.