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
lana [24]
3 years ago
8

R/3+2=21 solve for r

Mathematics
1 answer:
olchik [2.2K]3 years ago
7 0

Answer:

r=63

Step-by-step explanation:

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

                    r/3-(21)=0             r

Simplify   —

           3

r    

 — -  21  = 0

 3     2.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  3  as the denominator :

         21     21 • 3

   21 =  ——  =  ——————

         1        3  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

You might be interested in
Lin's father is paying for a $30 meal. He has a 15%-off coupon for the
Natali [406]

Answer:

$27.03

Step-by-step explanation:

Multiply: .15 times 30 =4.5 (to get from a percent to a decimal, move the decimal twice to the right.

Subtract: 30 minus 4.5= 25.5

Multiply: 25.5 times 1.06= 27.03

$27.03

Hope this helped!! :)

Brainliest?!?!

Stay safe and have a wonderful day/afternoon/night!!!

4 0
3 years ago
Which term best describes the point, line, or curve defined by the intersection
Molodets [167]

Answer:

B. Conic section

Step-by-step explanation:

A plane and an cone intersecting takes a section of the cone.

Hope this helps!

8 0
4 years ago
Read 2 more answers
The three angles in a triangle are in the ratio 3:4:5. Find the angles
insens350 [35]
The angles are 45° 60° and 75°

Elaboration:
Let the three angles be 3x 4x and 5x
( since the sum of interior angles of triangle=180° )
3x+4x+5x= 180
12x = 180
x = 15
3x= 45
4x= 60
5x= 75


3 0
2 years ago
two trucks leave a factory at the same time. one travels east 60 miles per hour, and the other travels west at the 39 miles per
Dahasolnce [82]

<u>Answer:</u>

Both trucks are 150 miles after 1.516 hours

<u>Solution:</u>

Given, Two trucks leave a factory at the same time.  

one travels east 60 miles per hour, and the other travels west at the 39 miles per hour.  

We have to find In how many hours will they be 150 miles apart?

Let the time after which they will be 150 miles apart be t.

Now, we know that, <em>distance = speed x time. </em>

For 1st truck ⇒ distance from factory = 60 x t

For 2nd truck ⇒ distance from factory = 39 x t

Here, t is same for both trucks as time is seen from common point of view.

Now, according to the given information,  

distance of 1st truck from factory + distance of 2nd truck from factory = 150 miles.

60t + 39t = 150

99t = 150

t = 1.516 approximately.

Hence, both trucks are 150 miles after 1.516 hours.

3 0
3 years ago
Read 2 more answers
4. Rhea obtained a CO-OP credit working at a computer store. They have now hired her for a summer job with
Harman [31]

Answer:

1. E = 8h + 0.05s

2. $2,800

3. please check explanations

Step-by-step explanation:

Firstly, we need an expression for what she earns.

The key to answering this is to know that 5% is same as 5/100 = 0.05

So , if her total sales is given as S, the amount she makes as commission would be 0.05s

So the Total earnings given that she works h hours per week and earns $8/h is $8h

So total earnings E = 8h + 0.05s

Now we want to get to total sales given she worked 15 hours last week and earned $260 in total.

What this means is that we have h and E and we want to find s for that week.

What we need to do is to plug the values into the equation we have defined above;

Thus;

260 = 8(15) + 0.05s

260 = 120 + 0.05s

0.05s = 260-120

0.05s = 140

s = 140/0.05

s = $2,800

I think employers offer commission to serve as a form of morale booster which helps to make their employees work better by sustaining their enthusiasm on the job and also augment their salaries

No, I do not think there are potential problems

8 0
3 years ago
Other questions:
  • With an 18% discount, Joan was able to save $13.23 for a coat. What was the original price of the coat?
    6·2 answers
  • If g(r) =2(r-1), Find g(10)
    13·1 answer
  • 30 points!!<br><br> What is the value of x?<br> A. 10√3<br> B. 10<br> C.​ 5√3<br> D. 5
    13·1 answer
  • A recent nationwide study investigated the value of the prostate-specific antigen (PSA) blood test for the detection of prostate
    9·1 answer
  • Square root of 192 simplified
    14·1 answer
  • Round your answer to the nearest hundredth AC=
    6·1 answer
  • A rectangle has a length of (x + 3) centimeters and a width of (½ x) centimeters. If the perimeter is 16 centimeters, what is th
    8·1 answer
  • What is the value of x? (Bottom of the Picture included)
    8·1 answer
  • Ariana wants to buy a house in a few years. She spends $100 a month on takeout coffee. She spends $200 a month on fast food. Wha
    8·2 answers
  • Draw the graph of y=2x+3 on the grid
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!