Now consider a subset of the polynomials, the quadratics (polynomials with a degree of 2). Which operations would the set of quadratics be closed under? For each operation explain why it is closed or provide a counterexample showing why it is not closed. (Hint: Use quadratic expressions to test each operation, such as x2-1 or 3x2+x.)

1: 4 if the wew 35 surfboards at the beach how many were short boards?

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.

Atown has a population of 7000 and grows at 3% every year. to the nearest year, how long will it be until the population will reach 12400?