An ice-cream truck sells milkshakes for $3.50 and cones for $2. On Wednesday, a total of 45 milkshakes and cones were sold, and the truck operator collected a total of $142.50 from cone and milkshake sales. How many ice-cream cones were sold on Wednesday?

The seventh-grade students at charleston middle school are choosing one girl and one boy for student council. their choices for girls are michaela (m), candice (c), and raven (r), and for boys, neil (n), barney (b), and ted (t). the sample space for the combined selection is represented in the table. complete the table and the sentence beneath it.