Evaluate each expression for the given values of the variables. SHOW ALL WORK. -5(x+2y)+15(x+2y)

x=7

y=-7

E. which of the following is not a possible probability? a. 25/100 b. 1.25 c. 1 d. 0

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

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.