Solve using the substitution method. Use a graphing calculator to check your answer. 4x - 3y = 127x + 7y = 70
A. (-9, -4)
B. (6, 4)
C. (-6, 4)
D. No solution
Answer: B
Mathematics
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Factor completely, or state that the polynomial is prime.x3 - x2 + 7x - 7
A. (x2 + 7)(7x - 1) B. (x2 + 7)(x - 1) C. (x2 - 7)(x - 1) D. (x - 1)(x + 1)(x + 7)
Mathematics
Compute the product, expressing the answer in lowest terms.
× 
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operations and write the answer in the form 
where a and b are real numbers.(9 + 9i)(3 - 4i)
A. 63 - 9i B. -36i2 - 9i + 27 C. -9 + 63i D. 63 + 9i
Mathematics
In order to prepare her budget, Sue gathers receipts for all major expenses she has had over the last month. Round the figure to the nearest dollar.Donations to charity, $255.30
A. $254 B. $255.40 C. $256 D. $255
Mathematics