A machine can stamp 40 envelopes in 8 minutes. How many of these machines, working simultaneously, are required or needed to stamp 120 envelopes per minute?

Factor the triomial x2-8x+15

7/10 in a multiplication fraction

There are 500 children in elementary. Today 25 children are away. what percentage are present?

Jack spends 1 3/4 as long on his homework as jill. last week jill spent 6 1/2 hours on her homework. how long did jack spend doing his homework? the week before jack spent 19 1/2 hours doing his homework. how long did jill spend on doing homework?

For an ordered pair to be the solution to a system of equations, the ordered pair must be a solution to both equations. A.) True B.) False

The expression 5/9 (F - 32) shows how to convert from degrees Fahrenheit to degrees Celsius, where F represents the temperature in degrees Fahrenheit. What is the temperature in degrees Celsius when the temperature is 113 degrees F?

Simplify the remaining expression completely x^6y^4/xy^2

Greatest common factor of 8x and 40?

A small factory can produce 245 sofas each day or 315 overstuffed chairs per day. the workers produced 8,820 pieces of furniture to fill an order. if they built sofas for 18 days, how many days of production were needed to build the chairs?

At the beginning of mathematics class, Mrs. Reno gives a warm-up problem. She says, "I am think of a number such that 6 less than the product of 7 and this number is 85." Which number is she thinking of?