Which of the following parabolas opens upward and appears narrower than y = −3x^2 + 2x − 1? a. y = 4x^2 − 2x − 1 b. y = −4x^2 + 2x − 1 c. y = x^2 + 4x d. y = −2x^2 + x + 3

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

How can constraints be used to model a real-world situation?

The ratio of the height of two similar cylinders is 4 to 3 what is the ratio of their volumes