1) what are the 4 types of coloration that fish use and what purpose for each
2) what can fish behaviour tell us
3) what is an example of a fish behavior when it occurs
4) what are 2 things that cause the surface currents

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

6.5

step-by-step explanation:

you said it was in the question

~courtney

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct