Writing and reasoning : how do you know that 2+4 = 4+2? Explain

7) Kristin spent $306 on books. Math books cost $26 and English books cost $30. If she bought total of 11, then how many of each kind did she buy?

Find the difference (-8+5i) - (8-2i

Evaluate the following expression 2^-2

A rectangular athletic field is twice long as it is wide the perimeter is 90 yard dismention?

Jones figures that the total number of thousands of miles that an auto can be driven before it would need to be junked is an exponential random variable with parameter. fn. Smith has a used car that he claims has been driven only 10,000 miles.

A manufacturer made 7,234 boxes of coffee stirrers. Each box contians 1000 stirrers. How many stirrers did they make?

What is the intersection of the sets A=3, 4, 6 14, 19) and B = (1, 3 6, 8,14) ?

Ava has 1/2 cup and 1/8 cup measuring cups. What are two ways she could measure out 1 3/4 cups of flour.

Amelia and 2 of her friends went out to lunch. each girl ordered exactly same meal. the total cost was $55.08, which included an 8% tax. What was the price of each meal, not including tax?

What is half of 3 1/2