Answer:
x = 20/7 = 2.857
Step-by-step explanation:
i've done it before
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A D C B
AC=3
AD = 1.5 since D is the midpoint
DC = 1.5
C is the midpoint DB then DC=CB
since DC=1.5 then CB=1.5
AB=AD + DC+CB
AB = 1.5 + 1.5+1.5
AB = 4.5cm
Answer:
4 units
Step-by-step explanation:
Calculate the distance d using the distance formula
d = 
with (x₁, y₁ ) = (- 2, - 4 ) and (x₂, y₂ ) = (- 2, - 8 )
d = 
= 
= 
= 
= 
= 4
Answer:5x - 6
Step-by-step explanation:
Answer:
f(n) = 2 + 5n. This is an arithmetic sequence.
Step-by-step explanation:
f(1) = 7
f(2) = 7 + 5
f(3) = 7 + 5 + 5 = 7 +10
f(4) = 7 + 5 + 5 + 5 = 7 + 15
In general,
f(n) = 7 + 5(n -1 )
= 7 + 5n - 5
= 2 + 5n
We have the sequence 7, 12, 17, 22, 27 …
This is an arithmetic sequence, because it is a sequence of numbers in which the <em>common difference</em> between consecutive terms is 5.
