Simplify the expression.(-19) + 80 ÷ (-4)
A. -15
B. -39
C. 15
D. 39
Answer: B
Mathematics
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Show that the set has cardinal number ?0 by establishing a one-to-one correspondence between the natural numbers and the given set. Be sure to indicate the general correspondence.{5, 25, 125, 625, ...}
A.
| 1, | 2, | 3, | 4, | ..., | n, | ... |
| ? | ? | ? | ? | ? |
| 5, | 25, | 125, | 625, | ..., | n5, | ... |
B.
| 1, | 2, | 3, | 4, | ..., | n, | ... |
| ? | ? | ? | ? | ? |
| 5, | 25, | 125, | 625, | ..., | 52n, | ... |
C.
| 1, | 2, | 3, | 4, | ..., | n, | ... |
| ? | ? | ? | ? | ? |
| 5, | 25, | 125, | 625, | ..., | 5n, | ... |
D.
| 1, | 2, | 3, | 4, | ..., | n, | ... |
| ? | ? | ? | ? | ? |
| 5, | 25, | 125, | 625, | ..., | 5n, | ... |
Mathematics
Provide an appropriate response.Decide whether the expression is positive, negative, or zero. 
A. Positive B. Negative C. Zero
Mathematics
Write the first five terms of the arithmetic sequence with the given first term, a1, and common difference, d.a1 = 13; d = -5
A. 13, 8, 3, -2, -7 B. 13, 8, 2, -2, -7 C. 8, 3, -2, -7, -12 D. 18, 13, 8, 3, -2
Mathematics
Solve for x.
= 8
A. -5 B. -2 C. 2 D. -4
Mathematics