Q: 0 equals 2.5y plus 20

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- 5X + 25Y = 0 25Y = 5X Y = (1/5)X ============

7a+10=2a 7a+10-2a=0 5a+10=0 5a=-10 a=-2

4, -5

A=0 b=0 c=0

r2 + r - 20 = 0(r + 5)(r - 4) = 0r + 5 = 0 or r - 4 = 0r = -5 or r = 4

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- 5X + 25Y = 0 25Y = 5X Y = (1/5)X ============

7a+10=2a 7a+10-2a=0 5a+10=0 5a=-10 a=-2

168

20 as 10 x 0 = 0 so is just 10 + 10 = 20

-20

Algebra4y-4 plus y plus 24 equals 6y plus 20-4YCombine like terms5y+20=2y+20Isolate Y3y=0y=0

I come up with 20.

x2 + 9x + 20 = 0 ∴(x + 4)(x + 5) = 0 ∴x ∈ {-5, -4}

x + 20 + 10x = 20 + 9x 11x + 20 = 20 + 9x Subtract 20 from both sides: 11x = 9x Subtract 9x from both sides: 2x = 0 Divide both sides by 2: x = 0

4, -5

(3x-4)(x+5)

If you mean: x2+9x+20 then it is (x+4)(x+5) = 0 when factored