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sergejj [24]
3 years ago
13

If x =2/3, what is the value of the following expression? X^3 x 3 divided by 2/9 + 9x - 7-6x

Mathematics
1 answer:
Damm [24]3 years ago
3 0
This is a basic algebraic equation

And will be using PEMDAS to solve

P: Parentheses
E: exponents
M: Multiplication
D: Division
A: Addition
S: Subtraction

If you are unaware of PEMDAS this is the order at which you solve algebraic equation. So start from “P” and end with “S”


X= 2/3

2/3^3 Times 3 Divided by 2/9 + 9(2/3) - 7 - 6(2/3)

Now, personal I’d choose to convert fractions to decimals to simplify solving the equation. I doubt this is the only way to solve for the equation but I find this is the easiest

To convert a fraction to decimal you divide the numerator by the denominator.

So 2/3 is 0.666667
And
That means 2/9 is 0.222222

0.666667^3*3/0.222222+9(0.666667)-7-6(0.666667)

Making you answer roughly -0.999989

Hope this helps, but I’m not sure if this is completely right or not
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Draw and classify the polygon with the given vertices. Find the perimeter and the area of the polygon. M(-2,5), N(3,-2), P(-2,-2
Nadusha1986 [10]

Answer:

<em>Perimeter = 20.6cm  to 1dp  = 20.60cm to 2dp</em>

<em>Area = Base = 8.6/2 = 4.3 x 4.069  = 17.5cm^2</em>

<em>Height is found 4.07  cos( 54.47deg) 5/8.6 = 4.069cm</em>

Step-by-step explanation:

<em>Right angle side triangle, sides </em>

<em>= MN =8.6cm </em>

<em>= NP=5cm </em>

<em>= PM=7cm </em>

<em>= 25sq + 49sq = 74sq</em>

<em>MN^2 =√74 = 8.60232526704 = 8.6cm</em>

<em>P = 8.6 + 5 + 7 = 20.6cm </em>

5 0
3 years ago
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malfutka [58]
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8 0
3 years ago
Find a function that models the area A of an equilateral triangle in terms of the length x of one of its sides.
creativ13 [48]
A(x)=\frac{x^2\sqrt3}{4}
3 0
3 years ago
David's last equation to solve is x/100+3/100=8/100. Write and solve an equivalent equation with easier numbers that would give
JulijaS [17]
\sf\dfrac{x}{100}+\dfrac{3}{100}=\dfrac{8}{100}

Subtract 3/100 to both sides:

\sf\dfrac{x}{100}=\dfrac{5}{100}

Cross multiply:

\sf100x=500

Divide 100 to both sides:

\sf~x=5

Or we could just multiply both sides of the equation by 100, to give us:

\sf~x+3=8

Subtract 3 to both sides:

\sf~x=5
3 0
3 years ago
Last month Maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. Let x re
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Number of times she climbed 5-mile mountain trail = x
Number of times she climbed 10-mile trail = y
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equation  that can be used to find the number of times she hiked each trail is therefore
5x + 10y = 90
6 0
3 years ago
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