Solve the problem.Dave bought 10 packets of cookies for $32.00. Each packet of cookies contains 20 cookies. Find the cost of each cookie to the nearest tenth of a cent.
A. 3.2 cents
B. 0.2 cents
C. 16.0 cents
D. 17.1 cents
Answer: C
Mathematics
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Use a graphing calculator to make a conjecture as to whether each equation is an identity.cos(x + y) = cos x + cos y
A. Not an Identity B. Identity
Mathematics
Identify the vertex of the parabola.f(x) = -7(x + 3)2 + 5
A. (-3, -5) B. (-3, 5) C. (3, -5) D. (3, 5)
Mathematics
Add or subtract as indicated. Express the answer as a single polynomial in standard form.(x2 + 1) - (4x2 + 6) + (x2 + x - 9)
A. -2x2 + x - 14 B. -4x2 + x - 14 C. -2x2 + 7x - 8 D. -3x2 + x - 14
Mathematics
Provide an appropriate response.A proper fraction has the form 
. What is the largest possible number that x can be?
A. 21 B. 20 C. 22 D. 10.5
Mathematics