Perimeter Formula:

Area Formula:

Set perimeter Formula equal to b:

Plug formula for be we just made above into the area Formula:

Solve for L (you'll have to use quadratic formula) then plug that back into the area Equation and solve for b.
Here's a link to where the problem has been explained before (they go into more detail than me).
https://brainly.ph/question/468631
lmk if you need any more help
Answer:
23.83, The equation = (37.93 - (30 x 0.47))
Step-by-step explanation:
30 x .47 = 14.1
Subtract 510 from 375 because you need to find how many more points that he needs to get
ANSWER:
mean:47.8
mode:57
median:45
37, 38, 43, 45, 57, 57, 58
(+8)+(-9)
the answer is -1