Find a formula for the nth term of the sequence.-9, -7, -5, -3, -1 (every other integer starting with -9)
A. an = 2n - 11
B. an = 2n - 10
C. an = n - 19
D. an = n - 20
Answer: A
Mathematics
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Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Mathematics
Translate the problem to a system of equations; then solve using the elimination method.In a chemistry class, 4 L of a 4%-silver iodide solution are mixed with a 10%-silver iodide solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 2.0 L B. 3.0 L C. 1.0 L D. 4.0 L
Mathematics
Use the given information to find the exact value of the trigonometric expression.cos 2? = - 
; 
< 2? < ?
Find sin ?.
A. - 
B. 
C. 
D. - 
Mathematics
Rationalize the denominator. Assume variables represent non-negative values.
A. 128
B. 
C. 7
D. 
Mathematics