Answer:
The probability distribution for x:"number of children per family for this income group" is:
Step-by-step explanation:
With the information given we have the relative frequencies of each category.
We know:
Answer:
20°
Step-by-step explanation:
One way of doing this is to find the constant of proportionality, k:
8k + 6k + 4k = 90° Then 18k = 90°, and k turns out to be 90/18, or 5.
Then the angles are 8(5), 6(5) and 4(5). The smallest of these angles is thus 20°
1) 1/3x - 2/3 = -18
2) 1/3x - 2/3 + 2/3 = -18 + 2/3
3) 1/3x = -54/3 + 2/3
4) 1/3x = -52/3
5) (1/3x) divided by 1/3 = -52/3 divided by 1/3
6) x = -52/3 x 3/1
7) x = -52
Add the 3 numbers that you know.
Multiply the mean of 73 by 5 (numbers you have).
Add the numbers you are given.
Subtract the sum you have from the total sum to find your missing number.
Answer:
option C = (x+2)(x+1)
Option D = 3x^2+2x
Step-by-step explanation:
option C
(x+2)(x+1)= x*x+x+2x+2
(x+2)(x+1)= x^2 +3x + 2
X^2 : squared term
Option D = 3x^2+2x
3x^2 : squared term
