Find the solution to the system of equations by the substitution method.
A. (100, -27)
B. (-100, 27)
C. (-100, -27)
D. (100, 27)
Answer: A
Mathematics
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Multiply.(x2 - x - 7)(x - 1)
A. x3 - 2x2 - 6x + 7 B. x3 - 2x2 - 8x - 7 C. x3 - 2x2 - 7x + 7 D. x3 - 6x + 7
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Find an exact value.tan 
A. 
B. 2 + 
C. 
D. - 2 - 
Mathematics
For the pair of functions, find the indicated sum, difference, product, or quotient.f(x) = x2 + 1, g(x) = 7x - 6Find (f ? g)(x).
A. 7x3 - 6x2 + 7x - 6 B. 7x2 + 7x - 6 C. 7x3 + 7x2 - 6x - 6 D. 7x3 - 6
Mathematics
Write the number in scientific notation.In a certain state, the railway system carried a total of 103,000,000,000 passengers.
A. 1.03 × 1012 B. 1.03 × 1011 C. 1.03 × 1010 D. 10.3 × 1011
Mathematics