Answer:
45 cm
Step-by-step explanation:
Let length of the field in the drawing = x
80 : 120 :: 30 : x
Product of extreme = Product of means
80 * x = 120 * 30
(3, 1), (9, -1), (7, -4), and (1, -2)
(-1, 3), (5, 1), (3, –2), (–3, 0)
+4 +4 +4 +4
(3, 3), (9, 1), (7, -2), (1, 0)
-2 -2 -2 -2
(3, -1), (9, -1), (7, -4), (1, -2)
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n = -33
Let n = number
Sum of a number and 9
(n+9)
is tripled
3(n+9)
the result is six less then twice the number
2n-6
3(n+9) = 2n-6
Distribute
3n+27 = 2n-6
Subtract 2n from each side
3n-2n +27 = -6
n +27 = -6
Subtract 27 from each side
n+27-27 = -6-27
n =-33
f(2)= f(2-1)+3
f(2)=f(1)+3
D
