Use a calculator to perform the operation. Express your answer in scientific notation.
A. 2.87 × 1025
B. 2.87 × 1027
C. 2.865657742 × 1027
D. 6.62 × 101
Answer: B
Mathematics
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Factor. Check by multiplying.9x + 18
A. 2(x + 9) B. 9(x + 9) C. 9(x + 2) D. 9(x + 18)
Mathematics
Solve the equation for y.y2 - 4x + 3 = 0
A. y = ± 
B. y = ± 
C. y = ± 
D. y = ± 
Mathematics
Divide and simplify. Assume that all expressions under radicals represent positive numbers.
A. 3xy
B. 18x2y5
C. x2
D. 3x2y5
Mathematics
Roland had $10,500 in medical expenses last year and has no medical insurance. The IRS allows medical expense deductions for the amount that exceeds 7.5% of a taxpayer's adjusted gross income. If Roland's adjusted gross income is $31,000, how much can he claim as a medical deduction?
A. $10,500 B. $8,175 C. $7,500 D. $750
Mathematics