-1 2/3 as a decimal please help

Mathematics

2 answers:

Brums [2.3K]2 years ago

5 0

Answer:

-1.666666666

Step-by-step explanation:

we have a whole number which in this case is 1 and a fractional part which is 2/3.

wed can either turn 1 into a part of the mixed fraction which would be 5/3 so when we divide it gives you 1.666666666

or divide 2/3 which gives you 0.666666666 then just add the oone which gives you the same answer

SVEN [57.7K]2 years ago

4 0

Answer:

-1.6666666666667.

Step-by-step explanation:

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Which are the solutions of x^2 = –11x + 4?

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This is a quadratic equation, i.e. an equation involving a polynomial of degree 2. To solve them, you must rearrange them first, so that all terms are on the same side, so we get

$x^2 + 11x - 4 = 0$

i.e. now we're looking for the roots of the polynomial. To find them, we can use the following formula:

$x_{1,2} = \frac{-b\pm\sqrt{b^2-4ac}}{2}$

where $x_{1,2}$ is a compact way to indicate both solutions $x_1$ and $x_2$ , while $a,b,c$ are the coefficients of the quadratic equation, i.e. we consider the polynomial $ax^2+bx+c$ .

So, in your case, we have $a=1,\ \ b=11,\ \ c=-4$

Plug those values into the formula to get

$x_{1,2} = \frac{-11\pm\sqrt{121+16}}{2} = \frac{-11\pm\sqrt{137}}{2}$

So, the two solutions are

$x_1 = \frac{-11+\sqrt{137}}{2}$

$x_2 = \frac{-11-\sqrt{137}}{2}$