I am guessing Jack is 51 and Lacey is 17.
20/35 gallons per hour
(20/35) * 47 = around 27 gallons in 47 hours
(9x^4-13x^3-x-7)+(7x^3-2x+1)=
9x^4-13x^3-x-7+7x^3-2x+1=
9x^4+(-13+7)x^3+(-1-2)x-7+1=
9x^4+(-6)x^3+(-3)x-6=
9x^4-6x^3-3x-6
Answer: Option <span>D.)9x^4−6x^3−3x−6</span>
question 3 = $150 because 50% is one half of 100% so 300/2 = 150
