Simplify by using the order of operations. Round your answer to the nearest hundredth, if necessary.2.12 + 2.4 - 6.6
A. 4.41
B. 0.21
C. 0
D. -2.1
Answer: B
Mathematics
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Simplify by adding or subtracting like terms.6x + 10x
A. 16x2 B. 60x C. 32x D. 16x
Mathematics
RT = 42 ê and R2 = 84 ê. Find R1.
a. 42 ê
b. 63 ê
c. 84 ê
d. 105 ê
e. 126 ê
Mathematics
All references are to the figure below. The distance between A and D is a, and the distance between D and C is x. 
Assuming that A = 36°, ?BDC = 42°, and c2 = 21, find h, x, and a.
A. h ? 12.3, x ? 13.7, a ? 3.3 B. h ? 14.1, x ? 15.6, a ? 3.7 C. h ? 12, x ? 14, a ? 3.3 D. h ? 14, x ? 16, a ? 3.7
Mathematics
This frequency table gives the distribution of ages of 100 people in a small town. 
How many people are:30 years of age or older
A. 22 B. 42 C. 64 D. 58
Mathematics