A total of 40 people made cakes for a bake sale. Each person made 3 cakes. Mrs. Sanchez found that 15% of these cakes were chocolate. How many chocolate cakes were made for the bake sale?

The hypotenuse of a 45 -45 -90 triangle measure 7 square root 2 units

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?

Which of these angles are supplementary? a. 100o and 90o b. 78o and 102o c. 54o and 146o d. 12o and 78o