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3 years ago

R + 11 + 8r= 29 Show answer

Mathematics

2 answers:

____ [38]3 years ago

6 0

Answer:

r=2

Step-by-step explanation:

r + 8 r + 11 = 29

( 1 + 8 ) r + 11 = 29 9 r + 11 = 29

Now we can isolate and solve for r while always keeping the equation balanced: First, subtract 11 from each side of the equation:

9 r + 11 − 11 = 29 − 11

9 r + 0 = 18

9 r = 18

Now we can divide each side of the equation by 9 to get

r : 9 over 9 = 18 under 9

1 r = 2

r = 2

slavikrds [6]3 years ago

6 0

Answer: r = 2

Steps:

r + 8r + 11 = 29

9r + 11 = 29

9r + 11 - 11 = 29 - 11

9r = 18

r = 2

plz mark brainliest

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NeX [460]

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6 0

2 years ago

Read 2 more answers

PLZ HELP!!!! A pair of equations is shown below: y = 6x − 4 y = 5x − 3 Part A: In your own words, explain how you can solve the

Goryan [66]

Answer:

Step-by-step explanation:

y = 6x − 4

y = 5x − 3

A: chose a value for x(input) and get the out put (y) because the equation already in the slope intercept mode:y=mx+b

x y=6x-4 y=5x-3

1 y=2 y=2

2 y=8 y=7

0 -4 -3

slope :

y=6x-4 slope is 6 y intercept(0,-4)

y=5x-3 slope is 5 y intercept (0,-3)

solution of the pair of equation is the point of intersection :

6x-4=5x-3

6x-5x=-3+4

x=1 and y=6x-4 ⇒ y=6-4=2

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3 years ago

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hammer [34]

The amount of drugs that will be left after 12 hours is 17.42 mg provided Sarah takes 550 mg of an antibiotic every hour.

<h3>What is exponential decay?</h3>

Exponential decay can be described as a reduced amount of an original substance by a definite percentage over a period of time. It can be determined by using the formula:

$\mathbf{y = a(1 - r)^t}$

where;

y = total amount,
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t = number of growth periods = 12 hours

$\mathbf{y = 550(1 - 0.25)^{12}}$

y = 17.42 mg

Therefore, we can conclude that the amount of drugs that will be left after 12 hours is 17.42 mg.

Learn more about the exponential decay model here:

brainly.com/question/12940982

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