Simplify. [126 - (15 - 8)] - 42
A. 87
B. 103
C. 111
D. 135
Answer: B
Mathematics
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Compute the determinant of the matrix by cofactor expansion.
A. 0 B. -12 C. -24 D. 24
Mathematics
Solve the formula for the specified variable.V = 
Bh for h
A. h = 
B. h = 
C. h = 
D. h = 
Mathematics
Provide an appropriate response.A student wanted to estimate 21.5 × 0.0079 by first rounding each number. He solved the problem as follows.21.5 × 0.0079 is approximately equal to 20 × 0.008, which is equal to 0.016. So he estimated the answer as 0.016. Do you agree with the answer? If not, explain where the student went wrong and give the correct answer.
What will be an ideal response?
Mathematics
Solve by substitution. p + 9q = -126p + 8q = 20
A. p = 5, q = -1 B. p = -6, q = -1 C. p = 6, q = -2 D. No solution
Mathematics