7
1
3
27
Correct answer is B
\(5^{(x + 2y)} = 5\)
∴ x + 2y = 1.....(i)
\(4^{(x + 3y)} = 16 = 4^2\)
x + 3y = 2 .....(ii)
x + 2y = 1.....(i)
x + 3y = 2......(ii)
y = 1
Substitute y = 1 into equation (i)
\(x + 2y = 1 \implies x + 2(1) = 1\)
\(x + 2 = 1 \implies x = -1\)
\(\therefore 3^{(x + y)} = 3^{(-1 + 1)}\)
\(3^{0} = 1\)
Find the simple interest on N325 in 5years at 3% per annum. ...
find the first quartile of 7,8,7,9,11,8,7,9,6 and 8. ...
A ladder 16m long leans against an electric pole. If the ladder makes an angle of 65o with the ...
In how many ways can the letters of the word TOTALITY be arranged? ...