Why does the computer meet the need in the following activity?
?
Teaching a person to solve quadratic equations.
?
A. tutorial
B. doesn't need a computer
C. repetition
D. easy to correct
E. all of these choices
Answer: A
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Solve.The length of a rectangle is 10 inches more than its width. If 5 inches are taken from the length and added to the width, the figure becomes a square with an area of 400 square inches. What are the dimensions of the original figure?
A. 15 in by 20 in B. 20 in by 20 in C. 10 in by 20 in D. 15 in by 25 in
Solve the equation for exact solutions over the interval [0, 2?).cos2x + 2 cos x + 1 = 0
A. 
B. 
C. {?}
D. {2?}
Provide an appropriate response.Decide if the system has one solution, no solution, or an infinite number of solutions. x + y = 2 x + y = 8
A. Infinite number B. One C. No solution
Multiply and simplify.18 
A. 
B. -162
C. -2
D. 2