If 25% of cards in a deck are hearts, and there are 52 cards in a deck of playing cards, how many hearts are there?

Four more than a number is more than 13

Write 0.0002839 in scientific notation.

solve a right triangles with an acute angle of 14° and hypotenuse length of 100m. Express the angle to the nearest degree and the lengths to the nearest tenth of a metre.

Which expression is equivalent to 100n^2-1? A. (10n) ^2 - (1) ^2 B. (10n^2) ^2 - (1) ^2 C. (50n) ^2 - (1) ^2 D. (50n^2) ^2 - (1) ^2

Which survey method is the best representation of a target population? A) Survey elementary students about their teacher's opinions about lunch in the cafeteria. B) Survey high school students about where they like to drive a car.

Is the function in the table linear or nonlinear and why? x y 0,-100 and 1,-50 and 2,0 and 3,100 and 4,150. (A) The function is not linear because there are negative values in the y values.

The median size of a new house grew from 1780ft in 1997 to 2223ft in 2008. What is the percent of increase?

Can sombody tell me what is 10=-2c+22

What is the equivalent expression for a+a+a

What does the ratio of water and flour 10:4.5 mean?