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
Rus_ich [418]
3 years ago
14

What is the value of r in: 1/7(105+r)=20

Mathematics
1 answer:
stealth61 [152]3 years ago
6 0
Use the distributive property.

1/7(105 + r) = 20
15 + (1/7)r = 20

Then subtract each side of the equation by 15.

15 + (1/7)r = 20
(1/7)r = 5

Divide both sides by 1/7.

(1/7)r = 5

r = 35

So, the answer to this question is r is equal to 35.
You might be interested in
2/7x = 10 show work plz
Rashid [163]

Answer:

x = 35

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    2/7*x-(10)=0

                 2

Simplify   —

                  7

  2        

 (— • x) -  10  = 0

  7        

Subtracting a whole from a fraction

Rewrite the whole as a fraction using  7  as the denominator :

             10             10 • 7

   10 =  ——  =  ——————

               1                 7  

Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

           2x - (10 • 7)                       2x - 70

—————————————  =  ———————

                     7                                   7  

Pull out like factors :

  2x - 70  =   2 • (x - 35)

         2 • (x - 35)

 ————————————  = 0

                 7      

When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

      2•(x-35)

 ———————— • 7 = 0 • 7

          7    

Now, on the left hand side, the  7  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  2  •  (x-35)  = 0

Solve :    2   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solve  :    x-35 = 0

Add  35  to both sides of the equation :

                     x = 35

4 0
3 years ago
Read 2 more answers
The rectangle below has an area of x^2-15x+56x
vova2212 [387]
Report this clown who put the first answer he’s trying to get your ip
6 0
2 years ago
Six marbles are placed in a bag. One is green, two are yellow, and three are red. Without looking, Karen chooses one. What is th
REY [17]

Answer:

3/6 or 1/2

Step-by-step explanation:

If there is 1 green, 2 yellow, and 3 red marbles in the bag then there are 6 marbles total. She can only pull out 3 red ones seeming there are only 3 in the bag. Therefor the probability of her choosing a red marble is 3/6 or reduced to 1/2

5 0
3 years ago
Read 2 more answers
Rewrite 0.62 as a fraction in lowest terms.
ZanzabumX [31]

Answer: 31/50

Step-by-step explanation: 0.62= 62/100. After we must find the Greatest Common Factor which is two.

62/2=31  100/2=50

4 0
3 years ago
Read 2 more answers
What is the arithmetic of the following numbers? 3, 5, 6, 7, 9, 6, 8
lys-0071 [83]

Answer: sorry pressed the wrong button

Step-by-step explanation:

✅Mean:

➡️Sum of total numbers/Total numbers

3+5+6+7+9+6+8 / 7

44 / 7 = 6.285

MARK ME AS BRAINLIST IF THE ABOVE ANSWER HELPS U♥️♥️♥️....

3 0
3 years ago
Other questions:
  • The class president is organizing a class trip to a nearby amusement park for 314 students. The regular price is $35 per ticket.
    6·1 answer
  • At the farmers market, Nathaniel buys two dozen oranges at $3.50 per dozen, four kilograms of apples at $3.25 per kilogram, two
    5·1 answer
  • Whats the factors of 10^2
    11·2 answers
  • Solve for g:<br> 6g = 4 <br> Need help on this problem??
    11·2 answers
  • NEED HELP AND WILL GIVE BRAINLIEST!!!! Take a look below plz!!
    9·2 answers
  • A dinner party has 6 guests. How many ways can 6 chairs around a circular table
    5·2 answers
  • A limited-edition soccer ball costs $30, and the sales tax is 6%. What is the total cost?
    10·2 answers
  • A line has slope 3 and y–intercept 4.<br><br> Which answer is the equation of the line?
    10·1 answer
  • 2. Find the probability of a<br> batting average greater than<br> 0.261.
    10·1 answer
  • Please help me! worth 35 points!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!