3 years ago

8751 million as a number

Mathematics

1 answer:

Galina-37 [17]3 years ago

6 0

8,751,000,000.
......

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On interchanging two digits of the number 2643, it decreased by 180. Which two digits of 2643 might have been interchanged?

iris [78.8K]

Answer: D. 6 and 4

Explanation:

2643 - 180 = 2463 the 6 changes to a 4, and the 4 changes to a 6.

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What 28 over 3 as a mixed number

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9 1/3

Mark me brainliest if this helps!
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A construction crew is completing about 40 yards of a new highway each day. At this rate, how long will it take them to complete

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Identifying the values a, b, and c is the first step in using the Quadratic Formula to find solution(s) to a quadratic equation.

lesya692 [45]

The values of a, b, and c in given quadratic equation are:

a = 6 and b = -9 and c = 7

Solution:

Given quadratic equation is:

$-6x^2 = -9x + 7$

Let us first convert the given quadratic equation to standard form

The standard form is $ax^2+bx+c=0$ with a, b, and c being constants, or numerical coefficients, and x is an unknown variable

$-6x^2 = -9x + 7\\\\-6x^2+9x-7=0\\\\6x^2-9x+7=0$

Now we have to find the values of a, b, c

$\text {For a quadratic equation } a x^{2}+b x+c=0, \text { where } a \neq 0\\\\x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Thus comparing $6x^2-9x+7=0$ with standard form of quadratic equation $a x^{2}+b x+c=0$

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katrin [286]

Answer:

x = 2

Step-by-step explanation:

Given

1 + 4x = - 5 + 7x ( subtract 7x from both sides )

1 - 3x = - 5 ( subtract 1 from both sides )

- 3x = - 6 ( divide both sides by - 3 )

x = 2

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