1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Varvara68 [4.7K]
2 years ago
12

Please show work 7r + 21 = 49r

Mathematics
2 answers:
ozzi2 years ago
7 0

Answer:

r = 0.5

Step-by-step explanation:

First you need to isolate the r variable.

7r + 21 = 49r

-7r          -7r

21 = 42r

Then Divide both sides by 42

0.5 = r

Now check your answer by inserting it back into the original equation.

7(0.5) + 21 = 49(0.5)

3.5 + 21 = 24.5

24.5 = 24.5

The equation is true so r = 0.5

gulaghasi [49]2 years ago
5 0

Answer:

1/2 = r

Step-by-step explanation:

7r + 21 = 49r

Subtract 7r from each side

7r-7r + 21 = 49r-7r

21 = 42r

Divide each side by 2

21/42 = 42r/42

1/2 = r

You might be interested in
Show a way to count 170 to 410 using tens and hundreds circle at least 1 benchmark number
Lostsunrise [7]
What is a benchmark number?
4 0
3 years ago
Which equation will solve the following word problem? Vanessa spent $87.00 on entertainment for the week. Her rent costs twelve
Lunna [17]

Answer:

2 * $87 - $12 = R

Step-by-step explanation:

Let R represent the cost of Vanessa's rent.

Vanessa spent $87.00 on entertainment for the week.

Her rent costs twelve dollars less than double that amount. Breaking it down, the expression "double that amount" is expressed as (2 × 87). Subtracting 12 from double that amount, the final expression would become

R = 2(87) - 12

R =

R = 174 - 12

The correct option is

2 * $87 - $12 = R

5 0
3 years ago
What is the value of the expression 6+18 % 3x4
natka813 [3]
You tell me buddy :)
3 0
3 years ago
A regular hexagon has a perimeter of 72 feet. How long is each side?
Lena [83]

Step-by-step explanation:

a hexagon has 6 sides

so it's only 72/6

so each side is <u>1</u><u>2</u><u>f</u><u>t</u>

7 0
3 years ago
Read 2 more answers
Morgan begins biking south to the park at 20mph at noon. Corona leaves from the same point 15 min (.25hr) later to catch her. Ho
garri49 [273]

Answer:

X = 1h15mins

Step-by-step explanation:

      Rate Time  Distance  

Morgan  20    X              20X

Corona  25  X – ¼  25(X – ¼)  

If they meet each other, they need to travle the same distance, mean :  

20X = 25(X – ¼)  

X = 1.25  

1 hour and 15 minutes  

6 0
3 years ago
Other questions:
  • How many times will interest be added to the principal in 1 year if the interest is compounded annually?
    9·2 answers
  • 67% as a fraction in simplest form
    11·2 answers
  • What is the answer to this
    14·1 answer
  • A club swimming pool is 21ft wide and 41ft long. The club members want a uniform width border around the pool. They have enough
    10·1 answer
  • Dylan hikes 90 miles in 3 days. At that rate, how many days does it take him to hike a total of 240 miles?
    15·2 answers
  • A snowflake falls 6 feet in 4 seconds. At this rate, how far does a snowflake fall in 1 minute?
    7·1 answer
  • 5/10 and 1/6 are equivalent ratios
    6·1 answer
  • tell me you love me pls i need sum luv i spents alot of time doing this im doing another one but 100 pts
    6·1 answer
  • Find the product. Your answer should be in simplest form.
    5·2 answers
  • HELP HELP HELP
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!