7/8x²-3/4x - 5/8x²-1/4x+2
x²/4-x+2
Answer:

Step-by-step explanation:
The triangle is shown in the attachment.
Recall that;

This implies that;

We substitute the values into the ratio to obtain

Answer:
the mean is the sum of them all divided by the number of terms.
mean: 13
the mode is the element that occurs MOST in the data set.
mode: none
the median is the middle value of all of the numbers.
median: 9
We know that 1 cm = 400 km
Therefore, 22 cm = x
Cross multiply:
(1)x = (400×22)
x = 8800