A lumberman stacks planks of wood, starting with 30 planks in a row. Each row he stacks has one less plank than the row below it. The last row he stacks has 15 planks. How many rows of planks has he stacked?

12

15

16

18

A line has a slope of 1/4. What is a slope parallel to it? What slope is perpendicular?

Suppose a house has a floor area of 2,250 square feet. what is this area in units of square centimeters?

A librarian recorded the number of books that were checked out on each of the last 9 days, as shown below. 142, 136, 125, 148, 150, 152, 115, 131, 136 What is the mean of the data set? a 137.22 b 1, 235 c None of these d 9

Factor. x2+5x-14 polynomials and binomials

A model of a barn is composed of a cube and a triangular prism. The dimensions of the model of the barn are shown. What is the surface area, in square centimeters, of the model? a 3,000 b 3,048 c 3,504 d 3,624

If you see a triangle that has a small box in one angle, what type of triangle is it?

There are t teams in a soccer league. each team consists of 11 players. write an equation to find how many players p are in the league

Omar mows lawns for $9.25 an hour. He spends $7.50 on gas for the mower. How much does he make if he works h hours?

1/10 or 200 tables is what?

If 3 times a number minus 2 equals 13, what is the number? A. 4 B. - 6 C. 5 D. 2