When jeremy surveyed thirty 7th-grade students at the community pool, he found that 2/15 had not read at least one book during july. he knows there are about 200 7th-grade students in his community, so he infers that about 40 of them did not read any books in july. is that a good inference? explain.

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x