Solve the system for x and y using Cramer's rule. Assume a and b are nonzero constants.ax +by = 
x +y = 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Evaluate the algebraic expression for the given values of the variables.-7y2 for y = -2
A. 28 B. -14 C. 14 D. -28
Mathematics
Use a calculator to perform the operation. Express your answer in scientific notation.
A. 1.39 × 10-3 B. 1.39 × 10-11 C. 1.39 × 10-1 D. 1.388728918 × 10-11
Mathematics
Find the product.6.2 x 0.3
A. 2.96 B. 1.86 C. 6.5 D. 1.97
Mathematics
Write the phrase as a variable expression. Use x to represent "a number."The product of 2 and a number, added to 5
A. 5 + 2x B. 2 + 5x C. 10 + x D. 10x
Mathematics