<span>Equations:
a + b = 16
0.6a + 0.75b = 10.95
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a + b = 16
60a + 75b = 1095
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a = 16-b
12a + 15b = 219</span>
The equation can be simplified to 3a + 3b. Hope this helps :)
To find the midpoint of two points, simply plug them into the midpoint formula: <span>[(x1 + x2)/2,( y1 + y2)/2]</span>. This means that you're just finding the average of the x and y coordinates of the two sets of points, which leads you to the midpoint of the two coordinates. Let's say we're working with the (x1, y1) coordinates of (2, 5) and the (x2, y2) coordinates of (8, 3). Here's how you find the midpoint for those two points:[1] <span>[(2+8)/2, (5 +3)/2] =(10/2, 8/2) =(5, 4)</span>
<span>The coordinates of the midpoint of (2, 5) and (8, 3) are (5, 4).
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175-85=90
175-123=52
90+52=142
in total he spent $142 less than budgeted during those two months