Translate the phrase to an algebraic expression. Use x to represent "a number."The difference of a number and fifteen
A. 15x - 15
B. 15 - x
C. 
D. x - 15
Answer: D
Mathematics
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Find an explicit formula for an.-6, -5, -4, -3, -2, . . .
A. an = n - 7 B. an = n + 6 C. an = n - 6 D. an = n - 5
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Add.
A. 307 B. 406 C. 405 D. 506
Mathematics
Graph the ellipse. Label the foci and the endpoints of each axis.
+ 
= 1
A. F(±5, 0); V(±4, 0); no endpoints
B. F(±
, 0); V(±4, 0); U(0, ±3)
C. F(0, ±
); V(0, ±4); U(±3, 0)
D. F(±4, 0); V(±5, 0); U(0, ±3)
Mathematics
Write the number in scientific notation.57,000,000
A. 5.7 × 10-6 B. 5.7 × 10-7 C. 5.7 × 106 D. 5.7 × 107
Mathematics