Find the value of the polynomial 7y - y2 + 5 at y = -1.

If square root x = -7, then x= -49 true or false

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?