Which linear equation has the greatest y intercept? x + 6y = 36

Y = 15x + 5

3x + 8y = 24

Y = 4x + 7

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?