Add or subtract as indicated. Write the answer in simplest form.
+ 
A. 5a + 7
B. 
C. 
D. 
Answer: B
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Simplify the complex fraction.
A. -2
B. 
C. - 
D. 2
Given that the x- and y-coordinates of a moving particle are given by the indicated parametric equations, find the magnitude and direction of the velocity for the specific value of t.x = 
, y = 5t2 - 3, t = 2
A. 1.54, 270.1° B. 20.00, 270.1° C. 20.00, 90.1° D. 1.54, 90.1°
Determine how many of the first 5 statements in the sequence obtainable from the given statement are true.The measure of each interior angle of a regular polygon with n sides is 180 - 
. (n ? 3)
A. 5 B. 4 C. 2 D. 3
Solve the problem.What is the intensity in watt/m2 of a noise measured at 80 decibels? D = 10 log (S/S0), where S0 is 10-12 watt/m2. (Round to 3 significant digits.)
A. 1 × 10-4 watt/m2 B. 8 × 10-10 watt/m2 C. 1 × 10-3 watt/m2 D. 2.98 × 1015 watt/m2