Of the 35 students in my class, 11 practice karate, 11 play piano, and 20 take math lessons. $ students play piano and go to math classes, 3 students do karate and piano, 5 go to math class and karate, and 3 do non. How many students do all 3

Click on the graphic until you find the right quotient. (36xa - 30xb) ÷ (-6x2)

What is the rotational symmetry of a wheel

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?