Solve the pair of linear equations by addition.
What will be an ideal response?
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Find the indicated derivative.
if v = t + 
A. t - 
B. 1 - 
C. 1 - 
D. 1 + 
Write the word statement as an equation. Use x to represent the unknown number. Do not solve.Four times the sum of a number and 31 decreased by 9 is the same as the difference of six times the number and 15.
A. (4x + 31) - 9 = 6x - 15 B. (4x + 31) - 9 = 15 - 6x C. 4(x + 31) - 9 = 6(x - 15) D. 4(x + 31) - 9 = 6x - 15
Solve the system mentally, without the use of a calculator or pencil-and-paper calculation. Try to visualize the graphs of both lines.x + 0y = 90x + y = 4
A. x = 9; y = 4
B. x = 4; y = 9
C. x = 9; y = 2
D. x = 2; y = 
A die is rolled twice. Write the indicated event in set notation.Both rolls are even.
A. {(2, 4), (2, 6), (4, 2), (4, 6), (6, 2), (6, 4)} B. {(2, 2), (2, 4), (2, 6), (4, 2), (4, 4), (4, 6), (6, 2), (6, 4), (6, 6)} C. {(2, 2), (2, 4), (2, 6)} D. {(2, 2), (4, 4), (6, 6)}