What’s the y intercept ? or does it not have one ?

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.