Let x represent Jane’s age = x
Ben =2x
David = x – 7
Total age = x+2x +x-7
=4x – 7
joseph rimiru answered the question on October 21, 2017 at 20:19
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In a mathematics test, six students scored the following grades, 60, a, 40, b, c, d. Find their average score.
(Solved)
In a mathematics test, six students scored the following grades, 60, a, 40, b, c, d. Find their average score.
Date posted:
October 19, 2017
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Answers (1)
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Calculate the length of the base of a triangle whose height is equal to the length of the base and its area is 60.5 cm^2.
(Solved)
Calculate the length of the base of a triangle whose height is equal to the length of the base and its area is 60.5 cm^2.
Date posted:
October 19, 2017
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Answers (1)
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Findv(900) using factorization.
(Solved)
Find√(900) using factorization.
Date posted:
October 19, 2017
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Answers (1)
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Evaluate (0.36 x 4.2 x 8.4)/(0.007 x 25.5) correct to 2 decimal places.
(Solved)
Evaluate (0.36 x 4.2 x 8.4)/(0.007 x 25.5) correct to 2 decimal places.
Date posted:
October 19, 2017
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Answers (1)
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Evaluate (0.390 – 0.016)/20 correct to 3 decimal places.
(Solved)
Evaluate (0.390 – 0.016)/20 correct to 3 decimal places.
Date posted:
October 19, 2017
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Answers (1)
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A pile of 20 identical novels of 250 equal leaves is 4.32 m high. Find the thickness of each leaf in centimeters.
(Solved)
A pile of 20 identical novels of 250 equal leaves is 4.32 m high. Find the thickness of each leaf in centimeters.
Date posted:
October 18, 2017
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Answers (1)
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Monica’s car use 96.8 litres of petrol per week. Find how much it uses per day.
(Solved)
Monica’s car use 96.8 litres of petrol per week. Find how much it uses per day.
Date posted:
October 18, 2017
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Answers (1)
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A certain county received 1078.8 mm of rainfall in 8 days. What was the average rainfall per day?
(Solved)
A certain county received 1078.8 mm of rainfall in 8 days. What was the average rainfall per day?
Date posted:
October 18, 2017
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Answers (1)
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Evan’s vehicle travels 13 km on one litre of petrol. If he traveled for 624.60 km in one day, how many litres did he use?
(Solved)
Evan’s vehicle travels 13 km on one litre of petrol. If he traveled for 624.60 km in one day, how many litres did he use?
Date posted:
October 18, 2017
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Answers (1)
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If the product of two numbers is 21.8, find what is the other number if one them is 7.3.
(Solved)
If the product of two numbers is 21.8, find what is the other number if one them is 7.3.
Date posted:
October 18, 2017
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Answers (1)
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Juma made four trips from town A and B by bus. If the fare from A to B is sh 280 by bus and sh...
(Solved)
Juma made four trips from town A and B by bus. If the fare from A to B is sh 280 by bus and sh 320 by minibus, how much did the trips cost him?
Date posted:
October 18, 2017
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Answers (1)
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The distance between two ports on East African coast is 315 nautical mile. What is this distance in kilometres if one nautical mile is approximately...
(Solved)
The distance between two ports on East African coast is 315 nautical mile. What is this distance in kilometres if one nautical mile is approximately equal to 1.85 km ?
Date posted:
October 18, 2017
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Answers (1)
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If a metre of certain material costs sh. 345.75, what is the price of 14.5m of the material to be used by tailor?
(Solved)
If a metre of certain material costs sh. 345.75, what is the price of 14.5m of the material to be used by tailor?
Date posted:
October 18, 2017
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Answers (1)
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Mary bought 8 kg of sugar and 4 kg of rice at sh 95 and sh 100 per kilogram respectively. How much money did she...
(Solved)
Mary bought 8 kg of sugar and 4 kg of rice at sh 95 and sh 100 per kilogram respectively. How much money did she spend?
Date posted:
October 18, 2017
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Answers (1)
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A small hotel consumes 8.5 litres of milk every day. How much milk does the hotel consume in the month of May?
(Solved)
A small hotel consumes 8.5 litres of milk every day. How much milk does the hotel consume in the month of May?
Date posted:
October 18, 2017
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Answers (1)
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A tailor uses 2.85 m of material to make one school uniform. How much cloth does he use to make 90 such uniform?
(Solved)
A tailor uses 2.85m of material to make one school uniform. How much cloth does he use to make 90 such uniform?
Date posted:
October 18, 2017
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Answers (1)
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Evaluate (a) 0.15 x 0.05 = (b) 0.703 x 0.04 = (c) 0.0352 x 0.0403 = (d)0.00785 x 0.331 =
(Solved)
Evaluate
a. 0.15 x 0.05 =
b. 0.703 x 0.04 =
c. 0.0352 x 0.0403 =
d. 0.00785 x 0.331 =
Date posted:
October 18, 2017
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Answers (1)
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Evaluate (a)3.4 x 5 = (b) 44 x 0.206 = (d) 295 x 36.04 = (d) 39.6 x 6.21 =
(Solved)
Evaluate
a. 3.4 x 5 =
b. 44 x 0.206 =
c. 295 x 36.04 =
d. 39.6 x 6.21 =
Date posted:
October 18, 2017
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Answers (1)
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Three plastic jugs of capacity 0.85 litres, 0.79 litres, and 0.95 litres are filled using a container holding 4.5 litres of milk. How much milk...
(Solved)
Three plastic jugs of capacity 0.85 litres, 0.79 litres, and 0.95 litres are filled using a container holding 4.5 litres of milk. How much milk was left on the container?
Date posted:
October 18, 2017
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Answers (1)
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The distance between two towns A and C is 72.7 km. If town B is between A and C and is 52.7 km from C...
(Solved)
The distance between two towns A and C is 72.7 km. If town B is between A and C and is 52.7 km from C how far is B from A
Date posted:
October 18, 2017
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Answers (1)