Bags of nails weigh 200 grams each. Boxes of screws weigh 140 grams each. Both measurements are given to the nearest 10 grams. Show that 4 bags of nails could weigh the same as 6 boxes of screws.

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 tools or constructions is used to inscribe a hexagon inside a circle?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.