The text recommends simplifying an expression (combining like terms) before evaluating. do you think this is necessary? evaluate the expression 4x^2-5(x+2)+3x+10+2x for x=3: a. by substituting and then evaluating b. by fist simplifying and then evaluating. which method would you recommend? why?

‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼ ️‼️‼️‼️‼️ i have been waiting for almost an hour with no ! only answer if you absolutely know the ! explain your answer and ensure that it is you so so much!

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

How do you convert 1.27 to a percentage