320000 + x*142.31 = x*155.15
320000 + x*142.31 = y*155.15
the ratio of boys to girls is 3 to 2.if there are 12 boys ,how many girls are there
-1/2pi * sin(3pi/2)
sin(3pi/4)
find the value of tan 33degree by using lagrange's formula of interpolation x=30°,32°,35°,38°, tanx=0.5774,0.6249,0.7002,0.7813
factorize -8x+2
make X the subject of this formula
y-5=2+x/6
factorize 27-3x
2^x +x =5
