Just by looking at the answer choices, you can eliminate the last one because it is greater than the original price. And the first one is way too less, so your answer is B
-3 and four fifths would go in the middle of the other number lines, and -2.8 would go on the second to 0 of each number line. Same goes for the opposites
5x + 4y = 8
-5x + 3y = -1
Let's add both equations, to eliminate x.
5x + 4y - 5x + 3y = 8 - 1
7y = 7
y = 1
Let us substitute this value of y in equation 1, so we can find x.
5x + 4 = 8
5x = 4
x = 4/5
Answer:
the answer to this is 1/2(5+b)
