The graph of which function will have a maximum and a y-intercept of 4?
f(x) = 4x2 + 6x - 1
f(x) = -4x2 + 8x + 5
f(x) = -x2 + 2x + 4
f(x) = x2 + 4x - 4

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol

Do you mind if you guys me with this question i’m on number 8

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?