Solve the problem.In a home economics class, students cut triangular pieces of fabric for a quilt. Each triangle had a base of 19 centimeters and an altitude of 15 centimeters. What was the area of each triangular piece of fabric?
A. 17 square centimeters
B. 285 square centimeters
C. 142.5 square centimeters
D. 570 square centimeters
Answer: C
Mathematics
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Convert as indicated.0.4 m to millimeters
A. 0.0004 mm B. 40 mm C. 4000 mm D. 400 mm
Mathematics
Decide whether the given number is a solution to the equation preceding it.3m + 7 = 21; 4
A. No B. Yes
Mathematics
Solve the problem.A bag of marbles has twice as many blue marbles as green marbles, and the bag has at least 45 marbles in it. At least how many green marbles does it have?
A. At least 16 green marbles B. At least 30 green marbles C. At least 15 green marbles D. At least 23 green marbles
Mathematics
Use the quadratic formula to solve the quadratic equation.5 - x2 = 8x
A. 4 + 
B. -4 ± 2
C. -4 ± 
D. -1 ± 
Mathematics