Find the domain of the function.f(x) = x2 + 2
A. {x|x > -2}, or (-2, ?)
B. {x|x ? -2}, or [-2, ?)
C. {x|x ? -2}, or (-?, -2) ? (-2, ?)
D. all real numbers, or (-?, ?)
Answer: D
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Solve the problem.The following bar graph shows the average annual income for single mothers.
i) Determine a linear function that can be used to estimate the average yearly income for single mothers from year 0 through year 5. Let t represent the year.ii) Using the function from part i, determine the average yearly income for single mothers in year 3.iii) Assuming this trend continues, determine the average yearly income for single mothers in year 13.iv) Assuming this trend continues, in which year will the average yearly income for single mothers reach $33,000?
A.
| i) | I(t) = 775.8t + 24,269 |
iii) $34,354.40
iv) year 12
B.
| i) | I(t) = 775.8t + 24,269 |
iii) $34,354.40
iv) year 12
C.
| i) | I(t) = 770.8t + 24,269 |
iii) $34,289.40
iv) year 12
D.
| i) | I(t) = 775.8t + 24,269 |
iii) $34,354.40
iv) year 13
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered triple, if possible.
A. (20 + 11z, -16 - 4z, z) 
B. No solution
C. (20 + 11z, -8 - 4z, z) 
D. (20 + 12z, -16 - 4z, z) 
Write the statements S1, S2, and S3 and determine if each statement is true.Sn: 1 ? 2 + 2 ? 3 + 3 ? 4 + . . . + n(n + 1) = 
What will be an ideal response?
Find the unknown side of the right triangle using the information given to the nearest thousandth.hypotenuse = 10 m, leg = 6 m
A. 4 m B. 11.662 m C. 2 m D. 8 m