= $\frac{2}{1.509} + \frac{4}{2.6153}$
= 2(0.6705) + 4(0.3838)
= 1.341 + 1.5352
= 2.8762
raphael answered the question on January 16, 2017 at 06:10
-
The coordinates of the points A and B are (2, 5, 4) and (2, 1, 8) respectively.
(Solved)
The coordinates of the points A and B are (2, 5, 4) and (2, 1, 8) respectively. In what ratio does the point C(2, 4, 5) divide AB?
Date posted:
January 14, 2017
.
Answers (1)
-
Find to 4 significant figures the percentage error in the area of the rectangle.
(Solved)
The length and width of a rectangle measured to the nearest millimeter are 7.8 cm and 4.7 cm respectively.
Find to 4 significant figures the percentage error in the area of the rectangle.
Date posted:
January 14, 2017
.
Answers (1)
-
Mutuku and Kamau live 40 km apart. Mutuku starts from his home and cycles towards Kamau's house at 16 km/h.
(Solved)
Mutuku and Kamau live 40 km apart. Mutuku starts from his home and cycles towards Kamau's house at 16 km/h. Kamau starts from his home at 8:00 am and cycles towards Mutuku. At what time do they meet?
Date posted:
January 9, 2017
.
Answers (1)
-
A water tank 5 m long has a cross-section area of 135 m2
(Solved)
a) Find the capacity of the water tank in litres
b) Water was allowed into the empty tank at 10.00 pm at a constant rate of 25 litres per second. What time will the tank be completely full? Give your answer in 24 hours system.
Date posted:
January 9, 2017
.
Answers (1)
-
Calculate the angle the line 2x - 4y = 1 makes with the x-axis.
(Solved)
Calculate the angle the line 2x - 4y = 1 makes with the x-axis.
Date posted:
January 9, 2017
.
Answers (1)
-
Find the value of x when y = 6
(Solved)
A quantity x varies partly as the cube of y and partly varies inversely as the square of y. When y = 2, x = 108 and when y = 3, x = 259. Find the value of x when y = 6.
Date posted:
January 6, 2017
.
Answers (1)
-
How long would five men working 4 hours a day take to dig a trench 45 m long?
(Solved)
Three men working for 8 hours a day take 6 days to dig a trench 9 m long. How long would five men working 4 hours a day take to dig a trench 45 m long?
Date posted:
January 6, 2017
.
Answers (1)
-
Expand the expression $(2 - \frac{1}{5}x)^4 $ upto the term x3
(Solved)
Expand the expression $(2 - \frac{1}{5}x)^4 $ upto the term x3 and use the expansion to find the value of 1.964
Date posted:
January 6, 2017
.
Answers (1)
-
Find the value of x in;
(Solved)
Log (x - 2) + Log (x + 1) = 1 + Log 4
Date posted:
December 24, 2016
.
Answers (1)
-
Evaluate the following leaving your answer in surd form
(Solved)
$\frac{3}{2\sqrt 5 - \sqrt 7} - \frac {2}{2\sqrt 5 + \sqrt 7}$
Date posted:
December 24, 2016
.
Answers (1)
-
Solve the equation below
(Solved)
$4 sin^2x + 4cos x = 5\ for\ 0^\circ \le x \le 360^\circ$
Give your answer in degrees.
Date posted:
December 24, 2016
.
Answers (1)
-
Find all the integral values of x
(Solved)
Find all the integral values of x which satisfy Find all the integral values of x which satisfy $7\ge 4 - 3x \gt -2 $
Date posted:
December 24, 2016
.
Answers (1)
-
Find the values of a and b
(Solved)
The gradient of the curve y=x2 + ax + b at point (2, 6) is 7. Find a and b.
Date posted:
December 17, 2016
.
Answers (1)
-
For how long did Moses stay with the car?
(Solved)
Mr. Moses bought a new car for Ksh. 900,000 which depreciated at a constant rate of 8.5% per annum. After sometime, he sold it to a second hand car dealer at Ksh. 600,000. How long did he stay with the car?
Date posted:
December 17, 2016
.
Answers (1)
-
Make y the subject of the formula.
(Solved)
$T=2\pi\sqrt\frac{x^2\ +\ y^2}{gx}$
Date posted:
December 17, 2016
.
Answers (1)
-
How much did Mutua get from the sale of a car?
(Solved)
Mutua bought a used car at Ksh. 500,000. He spent further Ksh. 75,000 on it for repairs and modification. He then sold it at 20% profit. How much did he get from the sale?
Date posted:
December 16, 2016
.
Answers (1)
-
How much did Maina pay for a bag of potatoes?
(Solved)
If Maina sells a bag of potatoes for Ksh. 520, he makes a profit. If he had to sell the bag for ksh. 420, he would make a loss. If the profit is three times the loss, find how much he paid for the bag of potatoes?
Date posted:
December 16, 2016
.
Answers (1)
-
What was the salesman's total earnings for that month?
(Solved)
A salesman earns a basic salary of Ksh. 22,000 per month. In addition he was paid a commission of 2% for goods worth above Ksh. 60,000 but not more than Ksh. 90,000 and a commission of 3% for goods over Ksh. 90,000. In a certain month, he sold goods worth Ksh. 150,000. What was his total earnings for that month?
Date posted:
December 16, 2016
.
Answers (1)
-
Find the value of K in from the following
(Solved)
A line which joins the points A(3, K) and B(-2, 5) is parallel to another line whose equation is 5y + 2x = 10. Find the value of K.
Date posted:
December 16, 2016
.
Answers (1)
-
Find the length of the side of the square
(Solved)
One side of a square is increased by 4 cm while the other side is reduced by 6 cm. The area of the rectangle so formed is 24 cm2. Find the length of the side of the square.
Date posted:
December 16, 2016
.
Answers (1)