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forsale [732]
3 years ago
5

What is 7/81 + 7/9 as a proper fraction

Mathematics
1 answer:
Lorico [155]3 years ago
3 0
70/81 is 7/81+7/9 as a proper fraction
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Find the estimates of x^2-x-2=3
Julli [10]

Answer:

x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79

Step-by-step explanation:

Given

Quadratic equation is

x^2-x-2=3\\x^2-x-5=0

Roots of the quadratic equation ax^2+bx+c=0 are

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\

So, for the given equation roots are

x=\frac{1\pm\sqrt{(-1)^2-4(1)(-5)}}{2\cdot 1}\\x=\frac{1\pm\sqrt{21}}{2}\\so, x=\frac{1+\sqrt{21}}{2}\approx 2.79\\or\ x=\frac{1-\sqrt{21}}{2}\approx -1.79

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2 years ago
A wall is to be painted. A small rectangle in the middle of the wall will remain white to use for a projector. Find the area of
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Answer:

108, 15, 93

Step-by-step explanation:

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2 years ago
A Scale model of a building is 12 inches tall. The actual building is 160 feet tall. What is the scale factor of the model write
zhannawk [14.2K]

Answer:

133/10

Step-by-step explanation:

divide 160 and 12 then simplify your answer

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Answer:

Step-by-step explanation:

x = 136/2 = 68°

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