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3 years ago

Solve for r. -13 = r/9 + 8 r = ???

Mathematics

2 answers:

larisa86 [58]3 years ago

7 0

Answer:

r= -189

Step-by-step explanation:

Naya [18.7K]3 years ago

6 0

Answer:

r= -189

Step-by-step explanation:

You subract the 8 both sides: -13= r/9+8

Which equals to: -21= r/9

In order to get the 9 off, you have to cancel it by multiplying ( opposite of is multiplying) both sides:

9(-21)= r

And the final answer is: r= -189

You can check it by plugging in -189 to r and it works:)

Your welcome:)))

You might be interested in

Which of these equations have no solution? check all that apply

finlep [7]

Answer:

A, B, and E

Step-by-step explanation:

Let's look through each of the answer choices.

A) 2(x + 2) + 2 = 2(x + 3) + 1

Simplify this by expanding out the parentheses:

2x + 2 * 2 + 2 = 2x + 2 * 3 + 1

2x + 4 + 2 = 2x + 6 + 1

2x + 6 = 2x + 7

6 = 7

Well, we know that 6 is NOT equal to 7, so this has no solutions.

B) 2x + 3(x + 5) = 5(x – 3)

Simplify this by expanding out the parentheses:

2x + 3x + 3 * 5 = 5x - 5 * 3

5x + 15 = 5x - 15

15 = -15

Again, we know that 15 is NOT equal to -15, so this also has no solutions.

C) 4(x + 3) = x + 12

Simplify this by expanding out the parentheses:

4x + 4 * 3 = x + 12

4x + 12 = x + 12

3x = 0

x = 0

This actually does have a solution when x = 0, so eliminate this.

D) 4 – (2x + 5) = (–4x – 2)

Simplify this by expanding out the parentheses:

4 - 2x - 5 = -4 - 2

-2x - 1 = -6

-2x = -5

x = 2.5

This also has a solution when x = 2.5, so eliminate this.

E) 5(x + 4) – x = 4(x + 5) – 1

Simplify this by expanding out the parentheses:

5x + 5 * 4 - x = 4x + 4 * 5 - 1

4x + 20 = 4x + 19

20 = 19

Here, we know that 20 is NOT equal to 19, so this has no solution.

Hope this helps!

8 0

3 years ago

Read 2 more answers

What is the retail price of a couch at a furniture store that has a wholesale price of $115 and is marked up by 75 percent?

mel-nik [20]

115 + 0.75*115
= 115 + 86.25
= $201.25

4 0

3 years ago

Find the equation of a line parallel to y - 5 = 6x - 10 that passes through the point (4, 10). (answer in slope-intercept form)

ANEK [815]

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$\diamond\large\blue\textsf{\textbf{\underline{\underline{Question:-}}}}\diamond$

Find the equation of a line parallel to y-5=6x-10 that passes through (4,10)

$\diamond\large\blue\textsf{\textbf{\underline{\underline{Answer and how to solve:-}}}}\diamond$

❖ If lines are parallel to each other, they have the same slope.

So the slope of the line parallel to y-5=6x-10 is 6.

Now, since we're also given the point crossed by the line, we write the equation in point-slope form:-

$\sf{y-y_1=m(x-x_1)}$

Substitute 10 for y₁, 6 for m and 4 for x₁:-

$\sf{y-10=6(x-4)}$

On simplification,

$\sf{y-10=6x-24}$

Adding 10 to both sides results in:-

$\sf{y=6x-14}$

So we conclude that Option A is correct.

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7 0

1 year ago

!! IMPORTANT !! PLEASE HELP WILL MARK BRAINLIEST AND 30 POINTS PLEASE!!

telo118 [61]

Answer:

The answer is option 4.

Step-by-step explanation:

Option 1, the slope is :

$m = \frac{26 - 20}{0 - 68} = - \frac{6}{ 68} = - \frac{3}{34}$

Option 2, the slope represents miles per minutes.

Option 3, the y-intercept is (0,26).

7 0

2 years ago

In the coordinate plane, what is the length of the line segment that connects points at (5, 4) and (−3, −1) ?

tiny-mole [99]

To find the length of a line between two points with known x- and y- coordinates, use:
sqrt((change in x)^2 + (change in y)^2),
which I know may look confusing but it isn't really:

sqrt((5 - -3)^2 + (4 - -1)^2)
= sqrt(8^2 + 5^2)
= sqrt(64 + 25)
= sqrt(89)

8 0

3 years ago

Read 2 more answers