D
area of a rectangle = length × width
area = (2x + 3)(x - 4) ( expand using FOIL )
= 2x² - 8x + 3x - 12 = 2x² - 5x - 12 → D
The triplets are each 9 years old.
You can subtract 12 from 39 to get 27, then divide by 3 because of the three other kids
Let the number be x
<span>Then According to the equation : </span>
<span>2(X-4)=3(x+5) </span>
<span>2X-8=3X+15 </span>
<span>-23=3X-2X </span>
<span>X=-23</span>
Answer:
i think its B
Step-by-step explanation:
Move all terms not containing x to the right side of the equation
x=9
