Answer: 6
Step-by-step explanation:
y = mx + b, where b is the y-intercept, in this case, y-intercept is 6.
X=invested at 10%12000-x=invested at 15% .10x+ (.15)(12000-x)=1440 ;; 12% of the total amount is 12% of $12000. .10x + 1800-.15x=1440
-0.05x=-360x=7200 12000-x=4800 $7200 at 10%=$720$4800 at 15%=$720 That is $12000 earning $1440, and that is 12%
I’m not 100% sure but isn’t it x2 +xy +y2?
The number beside the letter . for example 6x, 6 would be the variable
6x + 45 + 3x = 180
9x - 45 = 180
9x = 135
x = 15