Answer:
c)21
Step-by-step explanation:
"To light a park, luminaries are placed along a length of 100 meters, if the first is placed in meter 1, the next in meter 4, the next in meter 7, and so on. in the following positions a luminary will be placed except in the subway:
a)13 b)19 c) 21 d)28? "
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Luminaries position:
It makes an AP with the first term of 1 and common difference of 3
The formula for this AP is:
- aₙ = 1 + 3(n-1) = 1 + 3n - 3 = 3n - 2
From the given options, only one is not in the same format:
because
- 21 = 3n - 2 ⇒ 3n = 23 and n= 23/3 is not an integer
Answer is: c) 13
An increase from 50 of 25 is a change of 50% (25 is the difference between the two numbers, and 25 is 50% of 50).
Answer:
7
Step-by-step explanation:
This is a 30-60-90 triangle. The side that include the 60 degree angle and the 90 degree symbol side length is half of the hypotenuse. The hypotenuse is 14 so IR is 7.
This is g composed of f of x where we first find f(x) then plug that into g(x)
g(f(-1))
g(2 * -1 + 3)
g(1)
1/4