To solve for the x, distribute first the numerical coefficients to the terms on the parentheses. This becomes,
7x - 21 = 4x + 20
Transpose all the terms with x and the constant on either sides of the equation,
7x - 4x = 20 + 21
3x = 41 ; x = 41 / 3
Thus, the answer is x = 41/3 which is fourth among the choices.
6.2^2 + b^2 = 8.7^2
38.44 + b^2 = 75.69
b^2 = 37.25
b ≈ 6.1
Answer:
A) Sample statistic
Step-by-step explanation:
A sample statistic is a number computed from values that belongs to a sample, to represent a whole population.
In this case the sample is the home owners in West Virginia that respond this poll in 1971, and the population is U.S.
