Find the first term and the common difference for the arithmetic sequence. Round approximations to the nearest hundredth.a21= 235, a36= 400
A. a1= 165, d = 15
B. a1= 165, d = 11
C. a1= 15, d = 165
D. a1= 15, d = 11
Answer: D
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Use a calculator to evaluate the expression, or state that the value does not exist. Round the answer to four decimal places when necessary.tanh-1 4
A. 1.0007 B. 0.2554 C. does not exist D. 0.9993
Solve the problem.The position of a weight attached to a spring is s(t) = -7 cos 8?t inches after t seconds. What is the maximum height that the weight reaches above the equilibrium position and when does it first reach the maximum height?
A. The maximum height of 14 inches is first reached after 2 seconds. B. The maximum height of 14 inches is first reached after 4 seconds. C. The maximum height of 7 inches is first reached after 0.13 seconds. D. The maximum height of 7 inches is first reached after 4 seconds.
Solve. Write the fraction in simplest form.The circle graph shows the fraction of books read by grades one through five. What fraction of books was read by the fourth and fifth grades combined?
A. 
B. 
C. 
D. 
Write the sentence as an equation. Let the variable x represent the number.Three times a number is equal to 20 decreased by the number.
A. 3x = 20 - x B. 3 + x = 20 - x C. 3x = 20 + x D. 3x = x - 20