Answer:
Step-by-step explanation:
that's an equilateral triangle, 3 equal side and 3 equal angles of 60°,
so 10x + 20 = 60
solve with an equation
10x + 20 = 60
10x = 60 - 20
10x = 40
x = 40 : 10
x = 4
--------------------------
check
10 * 4 + 20 =
60°
the answer is good
.35 Gallons
Answer: 4.05 x y − 2 x + 45 y + 9.46
9x + 4.05xy + 15y + 30y - 11x + 9.46
4.05xy + 9x - 11x + 15y+ 30y+ 9.46
4.05 x y − 2 x + 45 y + 9.46
y = -x - 8
I don't know what it means by "fully symplified", but this is how I would answer.
Hope this helps, and if not, I'm sorry!
all have numbers 3 5 4 7
