To qualify for a lifeguard training course, you have to swim continuously for 500 yards either using the front crawl or the breaststroke. you swim the front crawl at a rate of 45 yards per minute and the breaststroke at a rate of 35 yards per minute. you take 12 minutes to swim 500 yards. how much time did you spend swimming the front crawl?

45

step-by-step explanation:

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function