Solve.The area code for a phone number in a city can be either 813 or 218. The rest of the 7-digit phone number can be formed with the digits 0 through 9. How many phone numbers can the city have before it needs to have another area code?
A. 1,000,000
B. 18,000
C. 130,000
D. 20,000,000
Answer: D
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Which of the following is not the definition of dilation? ?
A. ?Dilation is a transformation from which a figure is increased or decreased in size with respect to a line of symmetry. B. ?Dilation is a transformation from which a figure is increased or decreased in size with respect to a fixed point. C. ?Dilation is a reflection at a vertical line, in which a figure is increased or decreased in size. D. ?Dilation is an increase in the size of the figure at a line of symmetry. E. ?None of the above.
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 42 ? 45
A. 262,144 B. 16,777,216 C. 16,384 D. 1,048,576
Write the equation that results in the desired transformation.The graph of y = x2, vertically stretched by a factor of 5
A. y = -5x2 B. y = (x - 5)2 C. y = 5(x - 5)x2 D. y = 5x2
Find the greatest common factor of the terms.18t, 27
A. 54t B. 9t C. 18 D. 9