Determine whether the matrix is in row-echelon form. If it is, then determine also whether it is in reduced row-echelon form.
A. Yes; yes
B. Yes; no
C. No
Answer: C
Mathematics
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Express the number as the ratio of two integers.0.090909 . . .
A. 
B. 
C. 
D. 
Mathematics
Determine the quadratic function whose graph is given.
A. f(x) = -x2 - 9 B. f(x) = x2 - 9 C. f(x) = x2 + 9 D. f(x) = -x2 + 9
Mathematics
Use interval notation to represent all values of x satisfying the given conditions.y = 
- 
- 
and y is at least 0.
A. (-?, -5] B. (-?, -5) C. (-5, ?) D. [-5, ?)
Mathematics
Translate to an equation. Do not solve.52 is 65% of what?
A. 52 = 65 × n B. 52 × 65% = n C. 52 = 65% × n D. 52 × n = 65%
Mathematics