4.The scale on the map is 1:x. A lot having an area of 640 sq. m. isrepresented by an area of 25.6 sq. cm. on the map. What is the value of x?5.Solve for x:xxxxx¿¿¿=76.When the 3-digit numbers 5a4 and 3b4 are added together, the sum isdivisible by 9. What is the maximum value of a+b?7.If x + y = m, and xy = n, what is the value of x2+ y2?8.A polygon having 70 sides is called ______________.9.Given three angles A, B, and C whose sum is 180◦.if tanA + tanB + tanC = x, find the value ofSCORE
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tanA x tanB x tanC.10.Gerald and Leslie can do a certain job in 3 hrs. On a given day, they workedtogether for 1 hour then Leslie left and Gerald finishes the rest of the workin 8 more hours. How long will it take for Gerald to do the job alone?AVERAGE ROUND (5 QUESTIONS, 3 PTS EACH)1.A petal is formed by the intersection of the two circles of radius 4 withcenters at (0,4) and (4,0). Find the area of the petal.2.A diving board weighing 280N is 3m long. It is supported at a point 1.0mfrom the end and a diver weighing 500N stands at the free end. Determinethe magnitude of the force acting on the point of support.3.A solution was prepared by dissolving 5.8g sodium sulfate in water to make100mL solution. Find the molality of the solution if MMsol= 142 g/mol and ρ= 1.2 g/mL.
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