Find the exact value of the composition.cos-1 
A. 
B. 
C. 
D. - 
Answer: C
Mathematics
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The concentration of hydrogen ions in blood is 3.98 × 10-8. What is the pH of blood?
A. 8.0 B. 3.98 C. 6.6 D. 7.4
Mathematics
Find all values for which at least one denominator is equal to 0. Write answers using the symbol ?. Do not solve.
= 
A. x ? 18, 
, - 
, 
B. x ? - 
, 
C. x ? 18, 
D. x ? 0, 18, 
, - 
, 
Mathematics
Perform the indicated operation and simplify if possible.(2x3 + 2x2 - 9x + 1) - (8x3 - 6x2 + 4x - 8)
A. -6x3 + 8x2 - 13x + 9 B. -6x3 - 4x2 - 5x - 7 C. 10x3 - 4x2 - 5x + 9 D. 10x3 - 4x2 - 5x - 7
Mathematics
Simplify.3(2 - x) - 2(-6 + 4x)
A. -11x + 18 B. -7x + 18 C. 5x + 18 D. 3x + 18
Mathematics