A political analyst sampled 8,000 voting records from each of four counties. Of the samples, County A had 5,254 voters who voted in the last election, County B had 4,583, County C had 5,368, and County D had 4,396. The mean from the four counties is 4,900, with a standard deviation of 483. What is the total sample proportion of people who voted in these counties?

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180