What percent of 20 is 40?

This sum of this four digit even number's thousands and ones digits is 10

At noon, an aquarium contained 20 gallons of water. After several hours, it contained 18 gallons of water. What is the percent decrease in the water of the tank?

Rayza buys 6 simialar notebooks for $15. how much does she pay for each notebook?

This refers to relationships among and between variables. It has a value between - 1 and 1 that indicates direction and strength. It is usually denoted with 'r'.

Which could not be a possible outcome for the sum of rolling two numbercubes? (Adding the two numbers you roll together) A. 9 B. 7 C. 1 D. 12

Jan bought 6 cookies and 4 doughnuts for 3.50. Tom bought 12 cookies and 5 doughnuts got 5.23. Write and solve a system of equations to find the cost of one cookie

If 4/3x - 1/2 = 0 then x=

All of the students in Ms. Osbourne's class like pizza. Jeff is a student who likes pizza. Therefore, Jeff is a student in Ms. Osbourne's class.

Willie sold 72 fishing lures to the Bait Shop this month. He sold 4 times as many lures to the Bait Shop as to his friends. Let f represent the number of lures he sold to his friends.

How many solutions will there be to the following equation?16x^2=100