(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Solve the following pair of linear (Simultaneous ) equation using method of elimination by substitution :
2( x - 3 ) + 3( y - 5 ) = 0
5( x - 1 ) + 4( y - 4 ) = 0

Solve the following pair of linear (simultaneous) equation using method of elimination by substitution:
3x + 2y =11
2x - 3y + 10 = 0

Solve the following pair of linear (simultaneous) equation using method of elimination by substitution :
2x - 3y + 6 = 0
2x + 3y - 18 = 0

Solve th following pair of linear (Simultaneous ) equation using method of elimination by substitution :
`[ 2x + 1]/7 + [5y - 3]/3 = 12`

`[3x + 2 ]/2 - [4y + 3]/9 = 13`   

Solve the following pair of linear (simultaneous) equation using method of elimination by substitution:

`[3x]/2 - [5y]/3 + 2 = 0`

`x/3 + y/2 = 2 1/6`

Solve the following pairs of linear (simultaneous) equation using method of elimination by substitution:
`x/6 + y/15 = 4`

`x/3 - y/12 = 4 3/4` 

Evaluate : `9^(5/2) - 3 xx 8^0 - (1/81)^(-1/2)`

Express the following in logarithmic form:

5³ = 125

Express the following in logarithmic form:
10^–3 = 0.001

Express the following in logarithmic form:

`3^-2 = 1/9`

Express the following in logarithmic form : `(81)^(3/4) = 27` 

Express the following in exponential form : log₈0.125 = -1

Express the following in exponential form : 
log₁₀0.01 = - 2

Express the following in exponential form : log_aA = x

Express the following in exponential form : log₁₀1 = 0

Solve for x : log₁₀ x = -2.

Find the logarithm of : 100 to the base 10

Find the logarithm of : 0.1 to the base 10

Find the logarithm of : 0.001 to the base 10

Find the logarithm of : 32 to the base 4