I'm guessing it 30 it says 3 times the nber of trumpet players
Answer:
A.irrational
Step-by-step explanation:
because 9 can be square to 3 but 11 cant be squared at all.
Y=2x
so what you do is sub 2x for y in the top equation
x^2+(2x)^2=5
x^2+4x^2=5
5x^2=5
divide both sides by 5
x^2=1
sqrt both sides
x=1 or -1
sub back
y=2x
y=2(-1)
y=-2
y=2(1)
y=2
the solutions are (1,2) and (-1,-2)
