Find the exact value under the given conditions.sin ? = 
, 
< ? < ?; cos ? = 
, 0 < ? < 
Find sin (? - ?).
A. - 
B. 
C. 
D. 
Answer: B
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Solve the equation by completing the square.x2 = 7 - 8x
A. -4 ± 1
B. 4 + 
C. -1 ± 
D. -4 ± 
Simplify. Assume that all variables represent positive real numbers.
+ 6
+ 9
A. -69
B. -3
C. 69
D. -20
Solve the problem by writing and solving a suitable system of equations.Barges from ports X and Y went to cities A and B. X sent 30 barges and Y sent 8. City A needs 20 barges and B needs 18. Shipping costs $220 from X to A, $300 from X to B, $400 from Y to A, and $180 from Y to B. $8840 was spent. How many barges went where?
A. 15 from X to A 15 from X to B 6 from Y to A 2 from Y to B B. 18 from X to A 12 from X to B 2 from Y to A 6 from Y to B C. 20 from X to A 10 from X to B 0 from Y to A 8 from Y to B D. 16 from X to A 16 from X to B 4 from Y to A 4 from Y to B
Graph the expression on each side of the equals symbol to determine whether the equation might be an identity.
= tan ?
A. Not an Identity B. Identity