Question: please choose the correct answers for the problems below. 7. Evaluate: bx ( b - x ) - b if b = 5 and x

please choose the correct answers for the problems below.

7. Evaluate: bx ( b - x ) - b if b = 5 and x = -3 [A] 125 [B] 25 115 [D] 123 [E] None of these 8. Is 4 and/or - 1 a root of the equation y2 - 3y = 4 ? [A] 4 [B] - 1 [C] neither [D] both [E] can not be determined 9. Find the approximate perimeter of this figure, (consisting of a rectangle and a semicircle) to one decimal place, using T ~ 3.14. 4 m [A] 38.6 m [B] 30.6 m [C] 51.1 m 5m [D] 32.6 m [E] None of these 10. Simplify: 5xyz - xy + 6z - 13yz + 4yx -3zyx [A] 2xyz + 3xy +6z -13yz [B] 3xyz +6z -13yz +4 yx [C] 3xyz - 3xy +6z - 13yz +6yx- zyx [D] z-7y+(6-z) [E] None of these 11. Expand and simplify if possible: 5y(x - 2y + 3) [A] 5yx - 10y2 +15y [B] 5yx - 7y +5y3 5yx- 2y +3 [D] 5yx - 10y +15 [E] None of these

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