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Name________________________ ____Date _____________period___ HW 9.2 Laws of Exponents: Simplify each expression. 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: 16: 17: 18: A rectangle has an area of 56x10y7. If the width is 7xy2, then what is the length? 19: The volume of a rectangular prism is 30x5y7. If the length is 2x2y2 and the height is 3xy2, then what must the width be? ***STAAR review*** 1. If a graph shows a negative correlation, then that means as the x-values are increasing the y-values must be ____________________. 2. What is the meaning of the slope in the table. Time worked (hours) 0 20 30 40 Amount earned (dollars) 0 160 240 320 3. Solve for y. 6x + 2y = -18 4. The perimeter of a rectangle is 42 cm. The length is (x + 4)cm and the width is (2x – 7)cm. What are the dimensions of the rectangle in cm? 5. Write the equation for the line that goes through the points (2, -7) and (0, 9). 6. Given the linear parent function, y = x. Describe the changes of the line if the slope is multiplied by -1 and the yintercept is decreased by 2.