Replace the ? by < or >.3 ? -4
A. >
B. <
Answer: A
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Add.(9x2 + 8x - 12) + (16x + 12)
A. 9x2 + 8x + 24 B. 9x2 + 24x - 24 C. 33x3 D. 9x2 + 24x
Use half-angle identities to find the exact value of the expression.sec 
A. 
B. 
C. 
D. 
Write in exponential form.(-4)(-4)(-4)(-4)(-4)(-4)(-4)(-4)(-4)(-4)
A. -410 B. -4 ? 10 C. (-4)10 D. 10-4
Solve the problem.Some people must eat a low-sodium diet with no more than 2,000 mg of sodium per day. By eating 1 cracker, 1 pretzel, and 1 cookie, a person would ingest 149 mg of sodium. If a person ate 8 pretzels and 8 cookies, he or she would ingest 936 mg of sodium. By eating 6 crackers and 7 pretzels, the person would take in 535 mg of sodium. Find the amount of sodium in each.Which of the following is true?
A. A cracker has 30 mg of sodium. B. A cookie has 71 mg of sodium. C. A pretzel has 49 mg of sodium. D. None of these