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Three variables p, q and r are such that p varies directly as q and inversely as the square of r.
(a) When p = 18,...
(Solved)
Three variables p, q and r are such that p varies directly as q and inversely as the square of r.
(a) When p = 18, q = 24 and r = 4.Find p when q = 30 and r = 10.
(b) Express q in terms of p and r.
(c) If p is increased by 20% and r is decreased by 10% find:
(i) A simplified expression for the change in q in terms of p and r.
(ii) The percentage change in q.
Date posted:
August 27, 2019
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Answers (1)
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A spherical solid lead of diameter 12cm weighs 6.4kg. How much would a similar solid of a diameter 10cm weigh?
(Solved)
A spherical solid lead of diameter 12cm weighs 6.4kg. How much would a similar solid of a diameter 10cm weigh?
Date posted:
August 27, 2019
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Answers (1)
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The LCM of two numbers is 328,600 and the GCD is 20. If one of the numbers is 1240, use prime factorization method, find the...
(Solved)
The LCM of two numbers is 328,600 and the GCD is 20. If one of the numbers is 1240, use prime factorization method, find the other number.
Date posted:
August 27, 2019
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Answers (1)
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Solve for x in sin (x-15)-cos(x+5)=15
(Solved)
Solve for x in sin (x-15)-cos(x+5)=15
Date posted:
August 27, 2019
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Answers (1)
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Mwenda borrowed a short-term loan of Shs. 300,000 from a bank and arranged to pay back in three equal yearly installments of sh. 100,000 each....
(Solved)
Mwenda borrowed a short-term loan of Shs. 300,000 from a bank and arranged to pay back in three equal yearly installments of sh. 100,000 each. The bank charges compound interest at the rate of 20% per annum and ledger fee at 2 ½ per annum on any outstanding balance at the beginning of that year. In order to clear the loan on time, Mwenda paid the installment plus interest and ledger fee at the end of each year for three years. Calculate the total amount of money Mwenda paid back in order to clear the loan.
Date posted:
August 27, 2019
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Answers (1)
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Evaluate
(Solved)
Evaluate 
Date posted:
August 27, 2019
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Answers (1)
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The figure below represents a triangular prism. The faces ABCD, ADEF and CBFE are rectangles. AB = 8cm, BC = 14cm, BF = 7cm and...
(Solved)
The figure below represents a triangular prism. The faces ABCD, ADEF and CBFE are rectangles. AB = 8cm, BC = 14cm, BF = 7cm and AF = 7cm.
Calculate the angles between faces BCEF and ABCD.
Date posted:
August 27, 2019
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Answers (1)
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The data below represents the ages in months at which 6 babies started walking; 9, 11, 12, 13, 11 and 10. Without using a calculator,...
(Solved)
The data below represents the ages in months at which 6 babies started walking; 9, 11, 12, 13, 11 and 10. Without using a calculator, find the exact value of the variance of the data.
Date posted:
August 27, 2019
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Answers (1)
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A curve is given by the equation y = 5x3 – 7x3 + 3x + 2. Find the gradient of the curve at x...
(Solved)
A curve is given by the equation y = 5x3 – 7x3 + 3x + 2. Find the gradient of the curve at x = 1.
Date posted:
August 27, 2019
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Answers (1)
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A box contains 6 yellow balls, 4 white balls and 2 blue balls, all balls being similar in shape. A ball is picked at random...
(Solved)
A box contains 6 yellow balls, 4 white balls and 2 blue balls, all balls being similar in shape. A ball is picked at random without replacement and its colour noted. Use a tree diagram to determine the probability that at least one of the first two balls picked is blue.
Date posted:
August 27, 2019
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Answers (1)
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Three warships P, Q and R leave port X at 9:00am. Ship P sails at a steady speed on a bearing of 070°, 100km from...
(Solved)
Three warships P, Q and R leave port X at 9:00am. Ship P sails at a steady speed on a bearing of 070°, 100km from port X, while ship Q sails on a bearing of 320°, 80km from X. Ship R is on a bearing of 150° from port X and due south of ship P.
a) Using a ruler and compasses only construct a scale drawing to show the position of P,Q,R and X
b) Use the scale drawing to determine
i) the distance and bearing of ship P from ship Q
ii) the distance of ship R from port X
iii) the distance of ship R from ship P
Date posted:
August 27, 2019
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Answers (1)
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Make n the subject of the formula.
(Solved)
Make n the subject of the formula.
Date posted:
August 27, 2019
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Answers (1)
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Use logarithm tables to evaluate
(Solved)
Use logarithm tables to evaluate
Date posted:
August 27, 2019
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Answers (1)
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R varies as the square of S. If S is increased by 10%, find the ratio of the new value of R to the original...
(Solved)
R varies as the square of S. If S is increased by 10%, find the ratio of the new value of R to the original R.
Date posted:
August 27, 2019
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Answers (1)
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Two variables P and L are such that P varies partly as L and partly varies as the square root of L. Determine the relationship...
(Solved)
Two variables P and L are such that P varies partly as L and partly varies as the square root of L. Determine the relationship between P and L given that L = 16 when P = 500 and L = 25 when P = 800.
Date posted:
August 27, 2019
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Answers (1)
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Three variables P, R and S are such that P varies directly as R and inversely as cube of S. When R = 10, S...
(Solved)
Three variables P, R and S are such that P varies directly as R and inversely as cube of S. When R = 10, S = 2 and P = 2.5, find R when P = 15 and S = 5.
Date posted:
August 27, 2019
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Answers (1)
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Complete the table below for the function y=7 + 2x— 2x2 for the range -3= x = 4.
(Solved)
(a) Complete the table below for the function y=7 + 2x— 2x2 for the range -3= x = 4.
(b) (i) On the grid provided draw the graph of y=7 + 2x— 2x2 .
Take the scale:2 cm to represent 1 unit on x- axis
1 cm to represent 1 unit on y- axis
(ii) Use your graph to estimate the roots of 7 + 2x— 2x2 = 0.
(c) (i) By drawing a suitable line on the same axes in (b) above solve the equation
9 + 5x— 2x2 = 0
(ii) State the co-ordinates of the turning point
Date posted:
August 27, 2019
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Answers (1)
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The data below shows the masses in grams of 50 potatoes.
(a) On the grid provided draw a cumulative frequency curve for the data.
(b) Use the...
(Solved)
The data below shows the masses in grams of 50 potatoes.
(a) On the grid provided draw a cumulative frequency curve for the data.
(b) Use the graph in (a) above to determine:
(i) The 60th percentile mass.
(ii) Percentage of potatoes whose masses lie in the range 53g to 68g.
(iii) Median mass.
Date posted:
August 27, 2019
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Answers (1)
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A point (-5, 4) is mapped onto (-1, -1) by a translation T. Find the image of (-4, 5) under the same translation.
(Solved)
A point (-5, 4) is mapped onto (-1, -1) by a translation T. Find the image of (-4, 5) under the same translation.
Date posted:
August 27, 2019
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Answers (1)
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A trader purchases four 25kg bags of sugar and packages the sugar in 2kg, 1kg and 0.5kg packs to be sold in retail. The trader...
(Solved)
A trader purchases four 25kg bags of sugar and packages the sugar in 2kg, 1kg and 0.5kg packs to be sold in retail. The trader does the packaging in a ratio of 3:2:5 respectively. He makes a profit of Kshs 10 for every 2kg pack, Kshs 8 for the 1kg pack and Kshs 6 for the 0.5kg pack.
(a) Determine;
(i) The number of packets the trader made for each type of package.
(ii) The profit he will make if the wholesale price of a 25kg bag of sugar is Kshs 2000
(iii) The selling price of each type of package.
(b) Determine his percentage profit.
Date posted:
August 27, 2019
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Answers (1)