Red shift
cosmic microwave background radiation
the amount of hydrogen in the universe

all indicate that the universe is
a) rotating.
b) expanding.
c) shrinking.
d) at equilibrium.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex