Find the vertex of the function given below.
1 answer:
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Answer: 16
its just x plus 1/3 of x. This is harder to find so youre probably not expected to find it this way.
Actual way to solve it.
set up proportion.
=
cross multiply
3 x x = 3x
12 x 4 = 48
48 = 3x
divide by 3 to get x
48 / 3 = 16
x = 16
Answer:
11 years old
Step-by-step explanation:
If four brothers have the average age 6, then the sum of their ages is
years.
Let x years be the age of sister. If four brothers and their sister have the average age 7, then
Multiply this equation by 5:
The sister is 11 years old.