9514 1404 393
Answer:
see below
Step-by-step explanation:
Starting from the point-slope equation ...
y -y1 = m(x -x1)
Solving for y gives ...
y = mx +(y1 -m·x1)
So, the slope-intercept form equation is fairly easily found:
y = mx +b . . . . where m = m, and b = y1-m·x1
This is the equation we have used for 'b' in the attached spreadsheet.
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Of course, the formula for slope is ...
m = (y2 -y1)/(x2 -x1)
This is the equation we have used for 'm' in the attached spreadsheet. For all problems, we have used the first point. (It doesn't matter which point you use if there are two of them.)
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The second attachment is the Google Sheets spreadsheet saved in ODS format. Most spreadsheet programs should be able to open that so you can see the formulas, if you're interested. (The gray values of m are computed using the two points. The unshaded values of m are entered by hand.)
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I'll write a couple of equations in each group so you can see how the spreadsheet numbers relate:
y = mx +b
1. y = 2x -7
3. y = 2/3x +4
8. y = 1/3x -5
9. y = -5/2x +4
I am just going to assume that the non-shaded box is a square, and tha its side lengths are equal to x.
A.
This is because the area of the shaded is the area of the bigger square minus the area of the smaller.
B.
This is found by just plugging in the value of x into the previous expression.
Answer:
678.4
Step-by-step explanation:
Answer:
its 134
Step-by-step explanation:
Answer:
perimeter = 14
Step-by-step explanation:
perimeter = ∑sides
= x + (x + 3) + (x + 4) --------eq.
= 3x + 7
3x = 7
x = 7/3
plugin values into the equation:
perimeter = ⁷/₃ + (⁷/₃ + 3) + (⁷/₃ + 4)
= 14
therefore, the perimeter of a triangle is 14