Cho ánh xạ tuyến tính 3 3
: f → ℝ ℝ và hai cơ sở của
3
ℝ :
{ } 1 2 3
(1,3,3), ( ,6,5), (1,2,2) B b b n b = = = − = ,
{ } 1 2 3
2, 3,3 5, 1, 5 ( ), ( ), ( ) 1,0,1 C c c n c − − + = = = − = − .
Biết:
1
( ) ( 5,6,4) f b = − ,
2
( ) ( 8,5,2) f b = − ,
3
( ) ( 9, 2, 5) f b = − − − .
a. Tìm ma trận
3
[ ]E A f = , từ đó suy ra biểu thức của
1 2 3
( , , ) f x x x .

Reflect the point (7,0) across the y-axis

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.