Home->ACT Math

A certain watch costs $100, and a certain pearl necklace costs $300. If the cost of the watch increases by 5% and the cost of the pearl necklace decreases by 10%, what will be the sum of their new costs?

(A)$375

(B) $385

(C) $395

(D) $405

(E) $415

Which of the following is closest to the perimeter of quadrilateral FGHJ, in coordinate units?

（A）28 （B） 39.7 （C） 60 （D） 108 （E） 120

Quadrilateral FGHJ is shown below in the standard (x,y) coordinate plane. For this quadrilateral, = 10, = 6, = , and = 12.

Correct Answer: B

To make a cardboard table for her dollhouse, Ouisie uses a rectangular piece of cardboard measuring 40 inches wide and 60 inches long. She cuts out four equal-sized squares from each corner and folds down the sides at a 90° angle. If the top of the table measures 800 square inches, how tall, in inches, is the table?

（A）40 （B） 30 （C） 25 （D） 20 （E） 10

Correct Answer: E

What is the length, in coordinate units, of a diagonal of a square in the standard (x,y) coordinate plane with vertices at points (0,0), (4,0) and (4,4)?

(F) 3 (G) 4 (H) 4 (J) (K) 8

Correct Answer: H