Determine whether the relation is a function.
A. A function
B. Not a function
Answer: A
Mathematics
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Find all real numbers in the interval [0, 2?) that satisfy the equation.cos2x + 2 cos x + 1 = 0
A. 
B. 
C. 
D. 
Mathematics
Evaluate.80 - 4 ? 7 + 70 ÷ (-5)
A. 38 B. 518 C. -31 D. -1170
Mathematics
Solve.A triangular piece of glass is being cut so that the height of the triangle is 4 inches shorter than twice the base. If the area of the triangle is 48 square inches, how long is the height of the triangle?
A. 12 in. B. 14 in. C. 16 in. D. 8 in.
Mathematics
Divide and round to the nearest hundredth.-294.2388 ÷ 9.3
A. -3.16 B. 3.16 C. 31.64 D. -31.64
Mathematics