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Maths Puzzle
Co-ordinate geometry
Solve the linear equation
Price = 20 - (1/2)*d
Price = 6 + 3*d
d is unit of supply Plot two curves Price y-axis unit (d) x-axis
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Book Other Question
Angela is making punch for a party. She wants to combine a drink with 20% real fruit juice with a drink that is 90% real fruit juice. If she wants to end up with 20 cups of a mixture
In an organization there are CE's, ME's and EE's. The sum of their ages is 2160; the average age is 36; the average age of the CE's and ME's is 39; the average age of the ME's and EE's is 32 8/11; the average age of the CE's and EE's is 36 2/3. If each CE had been 1 year older, each ME 6 years and each EE 7 years older, their average age would have been greater by 5 years. Find the number of each group and their average ages.