The dot plots below show rainfall totals in the Highlands and Lowlands areas of a certain region.
Highlands
ooto
0000
too
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tooo
Dat000
t00000
+0000
2 4
8
+
14 16 18 20 22 24 26 28 30 32
Rainfall (mm)
Lowlands
LIE
2 4
6
8 10 12 14 16 18 20 22 24 26 28 30 32
Rainfall (mm)
PLEASE HELP

b. astronomers

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

im not preaty sure about that

step-by-step explanation: ax^2+bx+c=0= these nuts