Which is the simplified form of the expression 3 (7/5 x + 4) - 2 (3/2 - 5/4 x=

Step-by-step explanation: It is 20.  Multiply both [7/5]x + 4 and 3/2 - [5/4]x by 20 and then divide the resulting expression by 20:3(28x + 80) - 2(30 - 25x)                20Next, perform the indicated multiplication:  84x + 240 - 60 + 50x                  20This simplifies to:  34x + 180        17x + 9 =        20                  10

No

              At least 10 correct answers and no more than 2 wrong answers.

Step-by-step explanation:

Are the boundaries of the first equation viable in the second equation?

The boundaries of x + y = 12 are: (0, 12) & (12, 0)

Input those solutions into 100x - 200y = 600 to check for true statements:

               x        y             100x - 200y      

(0, 12)       0         12           100(0) - 200(12) = -2400 ≠600    <-- not viable

(12, 0)      12         0            100(12) - 200(0) = 1200 ≠600     <-- not viable        

The boundaries of the first equation are possible scores but NOT valid in the second equation.

Solve the system of equations:

100x - 200y = 600   →   1(100x - 200y = 600)   →   100x - 200y =   600

      x +  y =   12         →  200( x + y = 12)             →  200x + 200y = 2400  

                                                                                300x              = 3000

                                                                                                   x = 10

Input x = 10 to solve for y:

x + y = 12

10 + y = 12

       y = 2

You must get 10 correct answers and 2 wrong answers to achieve a score of exactly 600.

If you get more than 10 correct answers, your score will be greater than 600 and you would still win.