Find all solutions of the equation in the interval [0, 2?).cos2 ? + 2 cos ? + 1 = 0
A. 
B. {?}
C. 
D. {2?}
Answer: B
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Round the number to the nearest thousandth, nearest hundredth, and nearest tenth. Remember to round from the original number.51.99752
A. 51.998, 52.00, 52.0 B. 51.998, 51.90, 51.9 C. 51.997, 52.00, 52.1 D. 51.998, 51.99, 52.0
Identify the polynomial as a monomial, binomial, or trinomial. Give the degree of the polynomial.8x7 - 9x - 1
A. Trinomial, degree 8 B. Binomial, degree 8 C. Trinomial, degree 7 D. Trinomial, degree 9
Fill in the blank with one of the words or phrases listed below.
A symbol used to represent a number is called a 
.
A. variable B. base C. denominator D. numerator
Write the algebraic expression described. Simplify if possible.A quadrilateral is a four-sided figure whose angle sum is 360°. If one angle measures x°, a second angle measures 4x°, and a third angle measures 6x°, express the measure of the fourth angle in terms of x.
A. (360 - 11x)° B. (360 - 10x)° C. (360 + 11x)° D. (11x - 360)°