Solve the radical equation, and check all proposed solutions. = 7

A. {121}
B. {45}
C. {53}
D. {49}


Answer: B

Mathematics

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Multiply. Write the answer in simplest form.2 ? 4 ? 5

A. 40
B. 40
C.
D. 11

Mathematics

Find the length of the third side of the right triangle. Assume that c represents the length of the hypotenuse. Give an exact answer and, if appropriate, an approximation to three decimal places.a = 1, b = 7

A. = ; c ? 2.828
B. = ; c ? 6.928
C. = 8
D. = ; c ? 7.071

Mathematics

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Less than 15.2 seconds

A. 34% B. 68% C. 50% D. 16%

Mathematics

Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 8  - 3xy 

A. 2x2y2
B. 5xy3
C. 5x2y3
D. 2 xy2

Mathematics