A father and his son can clean the house together in 2 hours when the son works alone he takes him a hour longer to clean then it takes his dad alone find how long it takes her son to clean alone

Consider a large population with a mean of 150 and standard deviation of 27. a random sample of size 25 is taken from the population.

Two fair coins are flipped at the same time. What is the probability that both will display tails?

1/2,2/5,3/5,3/7 from least to greatest

For the purpose of purchasing new baseboard and carpet, complete parts a and b below. a. Find the area and perimeter of the room (neglecting doors). b. Identify whether baseboard has to do with area or perimeter and the same with carpet.

You ride your bike to school. As you approach an intersection, you decrease your speed by 1.5 miles per hour per second. Select an inequality that represents the time tt (in seconds) until your speed decreases by more than 10.5 miles per hour.

Elspeth knows that pi x r = 9.42 cm. What would she need to do to find the circumference? She could multiply 9.42 by 2. She could multiply 9.42 by pi. She could divide 9.42 by 2 to find the radius, then square the radius. She could divide 9.

On monday, 391 students went on a trip to the zoo. All 7 buses were filled and 6 students had to travel on cars. How many students were on each bus?

A car traveled at an average rate of 51 miles per hour on one highway. It then traveled at an average rate of 71 miles per hour on a second highway.

Question 10 of 11 Step 1 of 1 Correct Thcorrect One group (A) contains 390 people. Three fifths of the people in group A will be selected to win $100 fuel cards.

What is the y intercept of 12x+3y=9