In an examination, Kofi scored x% in Physics, 50% in Chem...
In an examination, Kofi scored x% in Physics, 50% in Chemistry and 70% in Biology. If his mean score for the three subjects was 55%, find x
40
45
55
60
Correct answer is B
\(\frac{x + 50 + 70}{3} = 55\)
x + 120 = 3(55)
x + 120 = 165
= 165 - 120
x = 45%
The number 25 when converted from the tens and units base to the binary base (base two) is one ...
Given that y = 1 - \(\frac{2x}{4x - 3}\), find the value of x for which y is undefined ...
A predator moves in a circle of radius √2 centre (0,0), while a prey moves along the line y = ...
If x varies directly as square root of y and x = 81 when y = 9, Find x when y = 1\(\frac{7}{9}\)...
If 7 + y = 4 (mod 8), find the least value of y, 10 \(\leq y \leq 30\) ...
Find the 9th term of the arithmetic progression 18, 12, 6, 0, -6 ......... ...
In the diagram above, the area of triangle ABC is 35cm2, find the value of y...
Points X and Y are respectively 12m North and 5m east of point Z. Calculate XY ...
Given that 2x + y = 7 and 3x - 2y = 3, by how much is 7x greater than 10? ...