Solve the problem.List all the combinations of 6 objects a, b, c, d, e, and f taken 2 at a time. What is C(6, 2)?
A. aa, ab, ac, ad, ae, af, ba, bb, bc, bd, be, bf, ca, cb, cc, cd, ce, cf, da, db, dc, dd, de, df, ea, eb, ec, ed, ee, ef, fa, fb, fc, fd, fe, ff
C(6, 2) = 36
B. ab, ac, ad, ae, af, bc, bd, be, bf, cd, ce, cf, de, df, ef
C(6, 2) = 15
C. ab, ac, ad, ae, af, ba, bc, bd, be, bf, ca, cb, cd, ce, cf, da, db, dc, de, df, ea, eb, ec, ed, ef, fa, fb, fc, fd, fe
C(6, 2) = 30
D. ab, ac, ad, ae, bc, bd, be, cd, ce, cf, de, df
C(6, 2) = 12
Answer: B
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Solve the following system by any appropriate method. If there is no real number solution, so state.
- 
= 1x + y = 7
A. (2, 4), (-16, 24) B. (2, 3), (-16, 25) C. (3, 10), (-17, -10) D. (3, 4), (-17, 24)
Find the area under the curve over the indicated interval.
y = 5 / x ; [1, 10]
Write the quotient in the standard form.
A. 1 + 
i
B. 
i
C. 
i
D. 1 + 
i
is an example of which property of real numbers?
A. commutative B. distributive C. associative D. none of these