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3 years ago

If xr-st=r, which expression represents x

Mathematics

1 answer:

Alexus [3.1K]3 years ago

7 0

Answer:

To get an expression relating to x you need to have x alone on one side of your equation. ie x =

Try this:

rx - st = r

remove st from the rx side

rx = r + st

now divide by r

x = (r + st)/r

You now have your expression relating to x

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If x+1/x = 5 find the value of x^3 +1/x^3. pls solve

Korolek [52]

Answer:

1) solve x+1/x = 5

$\frac{x + 1}{x} = 5$

$x + 1 = 5x$

$x - 5x = - 1$

$- 4x = - 1$

$x = \frac{ -1}{ - 4}$

$x = \frac{1}{4}$

2) solve x³+1/x³

$x {}^{3} + \frac{1}{x {}^{3} }$

substitute x = 1/4 into the expression

$( \frac{1}{4} ) {}^{3} + \frac{1}{( \frac{1}{4}) {}^{3} }$

$\frac{1}{64} + \frac{1}{ \frac{1}{64} }$

$\frac{1}{64} + \frac{64 \times 1}{1}$

$\frac{1}{64} + 64$

$\frac{4097}{64} \: or \: 64.02$

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3 years ago

Simplify. <br> <img src="https://tex.z-dn.net/?f=%5Csqrt%7B44%7D" id="TexFormula1" title="\sqrt{44}" alt="\sqrt{44}" align="absm

zvonat [6]

The answer is 6.6
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3 years ago

6 < 3x + 9 ≤ 18<br><br><br> please help me I will mark brainiest answer thanks

Olin [163]

Answer:

Step-by-step explanation:

6< 3x + 9

-3x < 9-6

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3x > 3

x > 3/3

x > 3

3x + 9 ≤ 18

3x ≤ 18-9

3x ≤ 9

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Not sure if the solution looks like this

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3 years ago

Read 2 more answers

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Llana [10]

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WILL MARK BRAINLYEST.

gtnhenbr [62]

Answer:

1) The straight line on the graph below intercepts the two coordinate axes. The point where the line crosses the x-axis is called the [x-intercept]. The [y-intercept] is the point where the line crosses the y-axis. Notice that the y-intercept occurs where x = 0, and the x-intercept occurs where y = 0.

2) There's another important value associated with graphing a line on the coordinate plane. It's called the "y intercept" and it's the y value of the point where the line intersects the y- axis. For this line, the y-intercept is "negative 1." ... This point will always have an x coordinate of zero.

Step-by-step explanation:

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3 years ago