Yes it's surprisingly for highschool can someone help I just can't figure it out ​

22

Step-by-step explanation:

For simplicity, let

x = teary smiley

y = tongue smiley

z = plain smiley

So now our system of equations is

From Eqn(1), we plainly see that

Now subtract Eqn(2) from Eqn(3) to get

But we know that , which then gives us

Using the values of and in Eqn(2), we find that Now that we the values of all the variables, use them in Eqn(3) and we'll get

answer: 25.4 units

step-by-step explanation: radius = 12.7 units

diameter = twice the radius

diameter = 12.7 x 2

= 25.4

i think 5 miles per hour

step-by-step explanation: