Translate the phrase into a mathematical expression. Use x to represent "a number". 7 times a number, decreased by 3
A. 7 - 3x
B. 7x - 3
C. 3x - 7
D. 3 - 7x
Answer: B
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Provide an appropriate response.
A piece of round steel is milled to a point at one end. The angle formed by the point is the angle of taper. If the steel has a 22-mm diameter and a 60° angle of taper, find the length c of the taper. 
A. 19.1 mm B. 11 mm C. 22 mm D. 21 mm
Solve and check:
If the expression is in exponential form, write it in radical form. If it is in radical form, write it in exponential form.
A. (
x + 
y)1/2
B. (5x + 3y)1/4
C. (5x + 3y)1/2
D. (5x + 3y)2
Solve the system of linear equations. If the system has infinitely many solutions, describe the solution with an ordered triple in terms of variable z.x + 8y + 8z=87x + 7y + z=18x + 15y + 9z=-9
A. (0, 0, 1) B. (1, -1, 1) C. (-1, 0, 1) D. no solution