On a certain day the exchange rate of mexican pesos for u.s. dollars was approximately 10 pesos for 1 dollar. if an exchange of 4,000 pesos was made that day, what was the approximate value of the exchange in dollars?

400 dollars

Step-by-step explanation:

10 pesos = 1 dollar

4,000 pesos = ? dollars

4,000 ÷ 10 = 400 dollars

We have the conditions : x + 3 > 0  and x - 2 > 0 ;
log2 ( x + 3 ) = log2 [ 3 / ( x - 2 ) ] ;
x + 3 = 3 / ( x - 2 ) ;
( x + 3 )( x - 2 ) = 3 ;
x^2 + 3x - 2x - 6 = 3 ;
x^2 + x - 9 = 0 ;
 For ax^2 + bx + c = 0, the value of x is given by:    ;
a = 1 ; b = 1 ; c = - 9 ;
then, x 1 ≈ 2.54 ; x 2 ≈ - 3.54 ;
The solutions are 2.54 and - 3.54 because its verify the conditions.