Why is 3/8 of 40=15 a logical answer ... not how to get the answer, but why my answer makes sense?

What are the solutions of this equation? 2x = x2 - 4

There are 16 cherry trees in Oliver's orchard, and he wants to plant more. It takes him an hour to plant each tree. Let h represent the number of hours Oliver spent planting and c represent the total number of cherry trees he will have.

Find the size of the final unknown exterior angle in a polygon whose other exterior angles are: 57° 68° 32°, 59° and 72º.

Three glasses of squash are made using cordial and water. The different mixtures are: Glass A: cordial: water = 3:22. Glass B: cordial = 1/8 of the total volume. Glass C: Cordial = 12.75% of the total volume.

What is the ratio of 52,853 to 18,827

A union contract calls for a 6.5% salary increase and the new salary that a worker currently making $58,500 under this contract can expect?

triangle STV has sides with lengths of 7, 11, and 14 units. Determine whether this is a right triangle.

Fred buys a binder for $4.50 and six reams of paper. Latasha buys an ink cartridge for $17.50 and four reams of paper. Both spend the same amount of money. What is the price of one ream of paper?

Question A gymnast, who can stretch her arms up to reach 6 feet, jumps straight up on a trampoline. The height of her feet above the trampoline can be modeled by the equation h = -16x2 + 12x, where x is the time in seconds after her jump.

Identify describe and extend each pattern 53,49,52,48,51,47