Simplify using order of operations.5 ? 9 - 9 ? 4 + 2 ? 5
A. 55
B. -19
C. 19
D. -55
Answer: C
Mathematics
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Find the greatest common divisor of the numbers.405 and 945
A. 135 B. 945 C. 405 D. 2835
Mathematics
Solve the problem.What pair of integers would be used to rewrite the middle term when factoring 18x2 - 57x + 35 by grouping?
A. -18, 35 B. 42, 15 C. -42, -15 D. 18, -35
Mathematics
Refer to the figure in following problems. Answer True or False.
1. AB\\CD
2. m? = m?3
3. m?1+m?3 = m?ADC
4. AB = CD
5. m?2 = 40°
Mathematics
Solve.After being struck with a hammer, a gong vibrates 45 vibrations in the first second and in each second thereafter makes 
as many vibrations as in the previous second. Find how many vibrations the gong makes before it stops vibrating.
A. 54 vibrations B. 270 vibrations C. 280 vibrations D. 49 vibrations
Mathematics