1st Quarter Review #9 7th Grade Math 1) 24% of the cars in the parking lot were blue. If there were 87 cars in the lot, about how many of them were blue? 2) Which expression is equivalent to 10 2 A. 6) 3 2 2 8 5 10 2 4) Use the graph to find the constant of proportionality (k) (unit rate). 5) The rectangle below has a length of 15 units and an area of 55 units2. Find the width of the rectangle. ______ x B. 10 2 C. 10 2 _______ 7) Holly can run 3) About 60% of the human body is water. At this rate, how many pounds of water are in the body of a 95-pound person? Name: _________________ ______ 1 of a 5 1 of a minute. 10 How many minutes does it take her to run a yard? 15 Width: ______________ K = __________ 8) Evaluate each expression. 9) Use proportions to find the missing sides (x) and (y) of the trapezoids. A. 3x 5 for x 8 yard in _______ B. x for x 35 7 _______ C. 10 6x for x 2 x = _______ _______ y = ________ 10) If the price of a MacBook decreased from $350 to $175, what was the percent of decrease? 11) Use the graph to complete 12) Which bottle of hair the missing portions of the table. conditioner is the best buy? 13) Simplify each expression. 14) Change into a decimal. 10.5 3 ______ x 5 8 oz. for $1.49 ________ A. 12 oz. for $2.29 _______ B. (6) 2 (5 7) 2 3 15) Use proportions to find the length of side EF. 5 8 ________ 15 oz. for $2.75 _______ C. 20 oz. for $3.89 _______ Time 1 ? D. 2 9 35 65 2 Calories ? 100 16) Graph and connect the following points, then find the area of the shape. ( -4, 3), ( -4, -2), and (5, -2). 22 30 _____ ______ 17) Identify the constant of proportionality (k) (unit rate) using the table below. 18) A $59 video game is on sale for 30% off. Find the final cost of the video game. Discount = _________ Area = _____________ k = ____________ Cost = ____________ 19) Simplify each expression. 2 _______ 9 20) Find the perimeter and area of the triangle below. A. 7 B. 3 2 6 1 _______ 5 3 C. 3 8 D. 6 1 4 _____ 7 5 10 2 2 ______ a). Perimeter = __________ b). Area = ______________