QUESTION one (10MARKS)
a. The sum of the first eleven terms of an A.P is 450 while the sum of the first seven terms of the A.P is 150. Find the first term and the common difference of the sequence. (5marks) b. Find the value of the variables in the following system of simultaneous equations.
3?? + ?? + ?? = 5 5?? + 2?? + 2?? = 9 4?? – 3?? – 2?? = 2 (5marks)
US$ Ksh80 Ksh0.0431 Ush1 Ush2.05 Tsh1
QUESTION two (10MARKS)
Calculate the percentage error arising due to the following computations.
a. 2.5 + 7.25 (2marks) b. 15.75 – 1.5 (2marks) c. 4.125 x 8 (3marks) d. 480.5 15.25 (3marks)
QUESTION three (10MARKS)
a. The hire purchase price of an item is Ksh.13,700. Jane bought the item on hire purchase and paid Ksh.6,000 as down payment. She paid the balance in 18 equal monthly installments. How much money did she pay per month? (4marks) b. An estate agent charges commission on the sale of assets as follows 5% on the first Ksh500,000 3% on the next Ksh250,000 2% on any extra sale At one sale the agent received Ksh35,500 as commission. Calculate the value of the sale and amount received by the owner. (6marks)
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