Answer:
17
Step-by-step explanation:
Set up a ratio and solve
(4x + 12) / 192 = 70 / 168
(4x + 12) * 168 = 192 * 70
672x + 2016 = 13440
672x = 11424
x = 17
2.75 I think
I hoped this helped
Can u repeat the question like the entire question or is that it
The distance traveled to the top of the escalator to the bottom is 52 ft
Here, we want to calculate the distance a person on the escalator travel from the bottom to the top of the escalator
Firstly, we need a diagrammatic representation to understand this
We can form a right-angled triangle with the information given in the question.
The diagram is shown as below;
From the question, by simply calculating the hypotenuse of the right-angled triangle, we can get the distance traveled from the bottom of the escalator to the top
Let us call this distance d
We can now use the appropriate trigonometric ratio
The trigonometric ratio to use here is the sine since we have the opposite and we want to calculate the hypotenuse
Mathematically;
Answer:
the mean of 8 children = mean of 5 boys + mean of 3 girls / 2
10.5 + 9.5 / 2
20 / 2
= 10 kg
therefore mean of 8 children is 10 kg