Answer:
0.7 inches
Step-by-step explanation:
The ratio of the map is 0.9 in = 1 mi, so 0.9 / 0.8 = 0.72 rounds to 0.7
hope this helps :)
3) x² - 121 = 0
x² = 121
x' = +√121
x' = 11
_______________
x'' = - √121
x'' = -11
Solution ⇒ S{-11 ; 11 } or (x-11)(x+11)
4) 4x² + 144 = 0
4x² = -144
x² = -144 / 4
x² = -36
x = √-36
No solution ⇒ S = ∅
5) z²+10z+21 = 0
Δ = 10² - 4(1)(21)
Δ = 100 - 84
Δ = 16
x' = (-10+4) / 2 = -6/2 = -3
x'' = (-10-4) / 2 = -14/2 = -7
Solution ⇒ S{ -7 ; -3} or (x+3)(x+7)
The mean of a sequence of numbers is the average.
The true statement is: 
The given parameters are:
The mean of a dataset is calculated as:
So, we have:
Multiply both sides by m
When the sequence is split into two, we have:
Where:
So, we have:
Hence, the true statement is:
Read more about mean and averages at:
brainly.com/question/16217700
Answer: 12
Step-by-step explanation: you need to look at the paper
