Solve.The sum of the measures of the interior angles of a triangle is 180°. The measure of the second angle is 2 times the measure of the first angle. The measure of the third angle is 84° more an the measure of the first angle. Find the measure of the third angle.
A. 113°
B. 108°
C. 98°
D. 118°
Answer: B
Mathematics
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Solve the problem.
The number sequence that corresponds to the figures above is 1, 6, 15, 28, . . . .These are the hexagonal numbers H1, H2, H3, H4, . . . .Use inductive reasoning to find a formula for the nth hexagonal number, Hn.
A. Hn = (n + 1)(2n - 1) B. Hn = n(2n - 1) C. Hn = 2n(n - 1) D. Hn = 5n - 4
Mathematics
Write the decimal as a proper fraction or mixed number in lowest terms.0.64
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.You have 120 feet of fencing to enclose a rectangular region. What is the maximum area?
A. 14,400 square feet B. 3600 square feet C. 896 square feet D. 900 square feet
Mathematics
Simplify the expression.
A. 21 B. 36 C. 20 D. 18
Mathematics