Step-by-step explanation:
The answer is in the pic above
What are we doing, adding, subtracting, multiplying.....
Easy
the value of the 7's in the decimal number, 257.76 is 0nes and tenths
Unfortunately, I can't do it on a graph here, but I will do it algebraically.
The solution on the graph will be the point of intersection of the two lines representing the equations.
y + 2.3 = 0.45x . . . . . (1)
-2y = 4.2x - 7.8 . . . . . (2)
From (2), y = 3.9 - 2.1x
substituting for y in (1), we have:
3.9 - 2.1x + 2.3 = 0.45x
2.55x = 6.2
x = 6.2/2.55 = 2.4
y = 3.9 - 2.1(2.4) = 3.9 - 5.04 = -1.2
Therefore, solution is (2.4, -1.2)
1/4 is one of the many correct answers to this question. You could also use 1/5, 1/6, 1/7, etc. Just remember the higher the numbers of a fraction the lower it is. If you have any more questions just ask im happy to help.
