Al has 3 red hats and 4 blue hats. How many red hats does he have?

Shannon rolls a number cube and then chooses a card from set of cards numbered 1 through 5. What is the proability that she will roll an even number and choose an odd - numbered card?

Recall that the symbol z represents the complex conjugate of z. If z = a + bi, show that the statement is true. Z - z is a pure imaginary number. Use the definition of complex conjugates to simplify the expression.

Julie runs 1 1/2 miles in 1/3 hour. How many miles will she run per hour at the same speed?

Solve the system: 6x=25y+1 5x-16y=-4

Louisa put her nickels collection into rolls that hold 40 nickles each. She filled 15 rolls and had 7 nickels left over. Altogether, how many nickels did louisa have?

Determine the mean of 28,40,53,39,45

What is the greatest common factor of 245, 1284, and 185?

The parking lot next to a business is shaped like a trapezoid. The shorter base and height are both 60 feet long. The longer base is twice as long as the shorter base. Write and Evaluate an expression to find the area of the parking lot.

True/False: Scholarships must be paid back and grants are free. True False Neither

Estimate. Then record the product. 640*3=