A Koala bear's lifespan is about 18 years. This is 15 years less than the lifespan of an ostrich. Write and
solve an equation to find the lifespan of the ostrich.

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

What function has a range {yly< 5}? question on picture above^