A and b. If c=90 when a =30 and b=28, find c when a =42 and b =42.

In a certain country the car number plate is formed by 4 digits from 1 to 9 followed by the alphabet. how many number plates can be formed if neither the digits nor the letters are repeated​

Convert 2 x^2 - 12 x - y + 20=0 into standard deviation​

Magbibigay ng 10 halimbawa ngpandiwang kagaganap pa lamang