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3 years ago

If rx-st=r, which expression represents x

2 answers:

eduard3 years ago

8 0

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

Softa [21]3 years ago

5 0

The correct answer is:

x = (r+st)/r; or

x = 1+ (st)/r.

Explanation:

To isolate the variable x, we must cancel everything else on that side of the equals sign.

We begin with st, since it is farther from x. Add st to each side:

rx - st = r

rx - st + st = r + st

rx = r + st

Now we divide each side by r:

rx/r = (r+st)/r

x = (r+st)/r = r/r + st/r = 1 + (st)/r

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Leona [35]

The slope of the line is $-\frac{2}{3}$ , and any line that is parallel to a line that has a slope of $-\frac{2}{3}$ always has the same slope because lines that are parallel always have the same slope.

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3 years ago

Read 2 more answers

What is the solution set of -|x|=-8

Novosadov [1.4K]

-|x|=-8

-x = - 8

x = 8

and

- (-x) = - 8

x = - 8

Answer

x = -8 , 8

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3 years ago

Raju's father is 26 years younger than raju's grandfather and 29 years older than raju. The sum of the ages of all the three is

Ugo [173]

Answer:

Raju = 17 years

Raju's father age = 46 years

Raju's grandfather age = 72 years

Raju's grandmother = 68 years

His sister = 10 years old

Step-by-step explanation:

Raju’s father is 26 years younger than Raju’s grandfather and 29 years older than Raju. The sum of the ages of all the three is 135 years. Also, Raju's Grandmother is four times of Raju’s age and his sister is 7 years younger than him.

Let

Raju's age = x

Raju's father age = x + 29

Raju's grandfather age = (x + 29) + 26

Total ages = 135

(x) + (x + 29) + (x + 29) + 26 = 135

x + x + 29 + x + 29 + 26 = 135

3x + 84 = 135

3x = 135 - 84

3x = 51

x = 51 /3

x = 17

Raju's age = x = 17 years

Raju's grandmother = 4 times raju's age

= 4 × 17 years

= 68 years

his sister = 7 years younger than him.

= 17 - 7

= 10 years old

Raju's father age = x + 29

= 17 + 29

= 46 years

Raju's grandfather age = (x + 29) + 26

= 46 + 26

= 72 years

3 0

3 years ago

Which equation would have the restriction x ≠−3 on the solution?

allsm [11]

Answer:

An example can be:

$f(x)=\dfrac{1}{x-3}$

Step-by-step explanation:

Which equation would have the restriction x ≠−3 on the solution?

The restriction is usually applied when the function is undefined at that point, in this case x=3.

This can happen when the denominator of a fraction became 0 at x=3. This would turn the function undefined.

An example can be:

$f(x)=\dfrac{1}{x-3}$

7 0

4 years ago

Find the slope of the line passing through the points ( 9, -5) and (1, -1)

Svetach [21]

Answer:

m = - $\frac{1}{2}$

Step-by-step explanation:

( $x_{1}$ , $y_{1}$ )

( $x_{2}$ , $y_{2}$ )

m = $\frac{y_{2} -y_{1} }{x_{2} -x_{2} }$

~~~~~~~~~

( 9 , - 5 )

( 1 , - 1 )

m = ( - 1 - ( - 5 ) ) / ( 1 - 9 ) = -  $\frac{1}{2}$

8 0

3 years ago