10x=80
divide each side by 10 to get x by itself
10/10x=1x
80/10=8
x=8
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the 4th root of 80 equals 2.9907
Equation: x^2 +2kx +10x +k^2 +5 = 0 Using the discriminant: (2k +10)^2 -4*1*(k^2 +5) = 0 Multiplying out the brackets: 4k^2 +40K +100 -4k^2 -20 = 0 Collecting like terms: 40k +80 = 0 => 40k = -80 => k = -80/40 Therefore the value of k = -2
84
80=4x, z=6x. find Z. x=80/4, x=20. z=6x20 z=120 answer= 120
The answer is 8. The equation is 10x-2=78. Add 2 to both sides so that the equation is 10x=80. Then divide by 10 to get x by itself. You are left with x=8.