(x+x/2),(y+y/2) you have two x values and two y values to substitute into the equation
Slope: M = rise/run = y2 - y1/x2 - x1
Point slope: y-y₁=m(x-x₁)
Slope-intercept: y = mx+b
Multiplying both sides of this equation by 3, to eliminate the fraction, we get:
9 + m = 6.
Next, we subtract 9 from both sides to isolate m: m = 6 - 9 = -3
Then m = -3.
Check: Subst. -3 for m in this equation:
9 - 3 6
------- = ------ = 2 (as expected). Thus, m = -3 is correct.
3 3
Problem #10:
4n - 9 = -9 Add 9 to both sides: 4n = -9 + 9 = 0.
Divide both sides by 4: n = 0.
Check: Substitute 0 for n: 4(0) - 9 = -9 is true.
-3.5(2-3n)-2.5n=-7+10.5n-2.5n
=-7+8n
So the answer is B
Please forgive me if this answers wrong but I think your answer will be 54, -6, 24
