Answer:
30
Step-by-step explanation:
Because of the following statement is not true no.of atoms
The answer is a rectangle or a square.
Minus 3y both sides
2y-6=-20
add 6 to both sids
2y=-14
divide 2
y=-7
By the pythagorean theorem the diagonal length will be:
d^2=x^2+y^2 and since this is a square x=y so
d^2=2x^2 and since d=15
225=2x^2
x^2=112.5
x=√112.5 yds
x≈10.6 yds (to nearest tenth of a yard)
