Solve the problem.If half a number is added to 7, the result is greater than or equal to -3. Find all such numbers.
A. x ? -21
B. x ? 4
C. x ? -20
D. x > -20
Answer: C
Mathematics
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Compute the expected age ? of a British nurse in 1851. Assume that the table below shows the age distribution of nurses in Great Britain in 1851. Round your answer to nearest hundredth. Age range (yr)20-29 30-39 40-49 50-59 60-69 70-79 80+ Midpoint (x)24.5 34.5 44.5 54.5 64.5 75.5 84.5 Percent of nurses5.8% 9.8% 19.4% 29.1% 25.1% 9.1% 1.7%
A. 54.50 B. 59.50 C. 53.76 D. 53.79 E. 43.79
Mathematics
Solve the given equation by finding the unknown value.?÷ 11 = 42
A. 11 B. 5082 C. 462 D. 451
Mathematics
Solve the equation.ln (3x - 4) = ln 20 - ln (x - 5)
A. ? B. 19/3 C. 5, 5/3 D. 0, 19/3
Mathematics
Simplify the expression.
A. - 
B. 18
C. - 2
D. 2
Mathematics