How to solve for x: 2x+y=3 and x+y=9

A math book is 1 and 1/2 inches thick. How many math books will fit on a shelf that is 2 feet long?

The population of Whoville has been decreasing at a rate of 0.8% per year since Dr. Seuss passed away in 1991. If the population was 13,500 at the beginning of 2005, which expression gives its population at the end of 1998?

The parallelogram has the vertices of A (4,4), B (6,4), C (9,9) and D (7,9) on a coordinate plane. Find the area of the parallelogram.

A deposit of 1600 at 6% for 180 days A.) 17.28 B.) 47.34 C.) 48.00 D.) 17,280.00

Be sure to round to 4 sig fig for your answer. 1) Convert 1202.57120 mL to L 2) Convert 0.1290743 g to dg.

What is 1/10 of 0.03?

At a school choir concert, 256 students are standing in rows. If the number of students in each row is equal to the total number of rows, find the number of students in each row.

The Student Council is surveying students about the cafeteria food at their school. They survey every 5th person from one bus at their school. Is this survey valid? A. Yes; there is a system to the survey B. Yes; the sample is large enough C.

4p^2 without exponent

Lucy is traveling at 90mph to her destination the destination is 850 miles away how long will it take her