If Mary is 2 year old and her sister is half of her age, now Mary is 100 years old, how old is her sister

Which answer choice decomposes the fraction 7/9? * 5/9 + 2/9 + 1/9 4/9 + 2/9 + 1/9 2/9 + 2/9 + 2/9

Solve the system of equations - 5x-3y=2-5x-3y=2 and - 4x+2y=-38-4x+2y=-38 by combining the equations.

A rectangular photo frame covers an area of 20 square inches on a wall. The width of the frame is 1 inch less than its length. Find the length and width of the photo frame.

5000 ones = how many hundreds?

Mr Wallace took 600mg of medicine. This was 75% of the full dose. What was the full dose?

Solve this inequality: 3 (x + 6) - 2 (x + 2) > (or equal to) 10

Is 4/5 greater than 1/3

Martha always tries to exercise at least 30 minutes a day. Write an inequality to represent the number of minutes Martha exercises each day.

A swimming pool has perimeter of 72 feet. The short sides measure 16 feet. What is the length of the longer sides of the pool

At the beginning of an environmental study, a forest covered an area of 1500km2. since then, this area has decreased by 7.1% each year. let t be the number of years since the start of the study. let y be the area that the forest covers in km2.