If g(x)=2x^2-5x-7 find g(-1), g(2), g(-3), g(4)

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?