No, this is not the correct translation of "twice a number x, plus 8." The correct translation would be 2x + 8.
That translation you wrote would be for 2 times 8 more than number x or something like that.
The answer is The Multiplication or Division Principle of Equality. It states that if you multiply or divide both sides of an equation by an expression, the resulting the equation will be equivalent to the original equation.
14x = 56
x = 4 <-- Divide both sides by 14
So, x is equal to 4.<span />
X 1 = π , x 2 = 3 π/ 2
y 1 = - 1, y 2 = 2
The Rate of change = ( y 2 - y 1) / ( x 2 - x 1 )=
= [2 -( -1 )] : ( 3 π /2 - π ) = 3 : π/2 = 6 / π ≈ 1.91
The answers are
B.12 3
C.2 6×3 3
The entire problem equals 12 3
but 2 6×3 3 means the same thing
4 miles because there are 5280 ft in one mile so if you were to multiply that by 4 you would get 21120 ft