Given the equations 2x+4/3y=1 and y - 9/13x=9, by what factor would you multiply the first equation so that combining the two equations would eliminate x?

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.