Historical Development Of Psycology

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Age: 1. In how many years will the teacher’s age be one third that of his student, if the teacher is 50 years old and his students is 14 years old? Answer: 1350+x=14=x x = 6 3 503+x3=14=x3 50 + x = 56 (Teacher) 50 + x = 14 + 3 x 14 + x = 20 (students) 50 – 42 = 3 x – x 122=2x2 6 = x 2. A woman is 5 times as sold as her youngest daughter. How old is she now if the sum of their ages is 50? Answer: 5 (x – 1) = 50 5(x – 1) = 50 5 x – 5 = 50 5(11 – 1) 50 5x5=555 510= 50 x = 11 50 = 50 Geometric: 3. An angle is four times as large as its complement. Find the degree measure of its angle? Answer: 3(4 x + 1 ) = 0 x= -312 or -14 12 x + 3 = 0 x + 1 = -14=+1= -54 12 x = -3 x+2=14+2= -94 12x12= -312 4. The length of the rectangle is 3 centimeters more than its width, if the rectangle has a perimeter of 100 cm., what are its dimensions? Answer: P = 2L + 2w P = 2(3) + 2(47) 100 = 2(3) + 2w 100 = 6 + 94 100 – 6 = 2w 100 = 100 942=2w2 w = 47 Work: 5. It takes 4 hours of a man to do the job and 6 hours for a woman to do it. How long will it take for the two of them working together? Answer: 14+16=1t 1214+16=1t12 3 + 2 = t 5 = t 6. Working together, a man and a woman can do the job in 8 hours. If either to do it alone, it would take a woman 2 hours longer than a man. How long will it take either a person to work alone? Answer: 1m-12=18 1m=18+128 m = 1+ 4 m = 5 hours for a man to do it Number: 7. The sum of two numbers is 63. If one number is twice the other, what are the number? Answer: x + 2x =

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