Which equation uses the distributive property to simplify the following? 6 × (10 + 0.09)
a.
60 + 0.54
b.
60 × 0.54
c.
60 + 0.9
d.
6 + 10 + 0.09

Really need on these. i have no idea what to do

Acircle has a circumference of 28.36 units what is the diameter of the circle

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)