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

Eric has 1-3 of a watermelon to share equally with 3 friend s. How much will each person get?

What is the perimeter of a rectangle with 7 in. Around

How do you kno 2130 is greater than 2/3

How do you simplify 27 over 20

The sum of two numbers is 63 and the difference is 9 . What are the numbers?

Ruby is visiting San Francisco. From her hotel she walks 1 block west ans 4 blocks south to a coffee shop. Then she walks 5 blocks east and 6 blocks south to a museum. Where is the museum in relation to her hotel

A youth chorus has 30 members. There are 14 boys in the chorus. What is the ratio of boys to girls in simplest form? A. 7/15 B. 8/15 C. 7/8 D. 8/7

Each morning Papa notes the birds feeding on his bird feeder. So far this month he has seen 59 blue jays, 68 black crows, 12 Red Robin's and 1 cardinal. If 300 birds visit Papa's bird feeder, how many blue jays can we expect to see?

What value of c makes the polynomial below a perfect square? x2 + 16x + c c = A. 32 B. 64 C. 4 D. 256

Find the y-intercept and x-intercept of the line. x-2y=-8