Solve the system by addition.
x + 
y = 2
x + 
y = 5
A. 
B. 
C. ?
D. 
Answer: C
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Provide an appropriate response.To find the cost of a product, you can use the formula markup plus selling price equals cost.
A. True B. False
Solve triangle ABC. Round side lengths and angle measures to the nearest tenth when necessary.a = 6.8, b = 13.5, c = 16.7
A. A ? 25.1°, B ? 49.2°, C ? 105.7° B. A ? 21.1°, B ? 51.2°, C ? 107.7° C. No triangle exists. D. A ? 23.1°, B ? 51.2°, C ? 105.7°
Find the value of (f ? g)' at the given value of x.f(u) = 
, u = g(x) = 6x2 + x + 2, x = 0
A. 
B. 
C. - 
D. 
Solve the problem.An element decays at the rate of S(t) = se-0.018t, where s is the initial amount in grams and t is the time in years since this initial amount was present. If you have a 76-gram piece of this element, how many grams will you have 4 years from now? Round your answer to the nearest tenth of a gram.
A. 81.7 g B. 0.9 g C. 37.3 g D. 70.7 g