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
balandron [24]
3 years ago
13

1. 9m = 81 m = ______2. 75 = 3n n = ______3. r ÷ 7 = 12 r =______

Mathematics
1 answer:
arsen [322]3 years ago
5 0
1.9m=81  divide each side by 9 so we leave m alone, which cancels out the 9 on the left side leaving m=81/9  which simplifies to m=8

2.75=3n again we need to get n alone, so we are going to divide by 3 on each side.  This cancels the 3 on the right side, leaving 75/3=n  simplified to 25=n or n=25

3. r÷7=12  We need r alone.  We always do the opposite of what is already being done.  So in this case 7 is being divided.  The opposite of divide is multiply (or times).  So we are going to multiply each side by 7.  This will cancel the 7 out on the left side and leave r=12x7.  So r=84

So in the first 2, they were being multiplied, so we did the opposite and divided.  
In the last one, it was being divided, so we did the opposite and multiplied.
If it was being added, we would subtract.
If it was being subtracted, we would add.

Hope that helps!  Good luck!
You might be interested in
What must be added to 3x-7 to make x^2 +4x-1 ?
Lera25 [3.4K]
You must add x^2+x+6
4 0
3 years ago
PLS GIVE A CORRECT ANSWER!!
gizmo_the_mogwai [7]
7 is the y-intercept
6 0
2 years ago
Read 2 more answers
The sum of two numbers is 18. Twice the first number (x) minus the second number (y) is 6. Find the two numbers
ki77a [65]

Answer:

8 and 10

Step-by-step explanation:

Set the first number as x, the second as y

x+y=18

2x-y=6

This is an binary system of first order equations

3x=24

x=8

y=10

8 0
3 years ago
Help me please come on please.
Alexeev081 [22]
I agree with 11.5 pounds
7 0
2 years ago
Simplify<br> x + x + y y
kolezko [41]

Answer:

2x+2y

Step-by-step explanation:

x+x = 2x

y+y = 2y

2x+2y

4 0
3 years ago
Other questions:
  • 8(a+b) when a is 5 and b is 3
    11·1 answer
  • What is the slope of y= 6x+2
    15·2 answers
  • Help me pleassseeeeeee
    10·1 answer
  • Pentagons ABCDF and JKLMN below are similar, but not necessarily drawn to scale. Find the values of x and y. A x = 40 mm, y = 15
    8·1 answer
  • HELP ASAPPPPPP! I HAVE BEEN WAITING FOR 20 MIN PLS HELP ME! A prism and two nets are shown below: Image of a right triangular pr
    8·1 answer
  • Write different types of sets<br> with examples from our daily life ​
    8·1 answer
  • I don't need an answer, I just need someone to explain how to do it. &lt;3
    8·2 answers
  • Please I need help I will mark brainiest
    15·1 answer
  • Which ordered pairs are in the solution set of the system of linear inequalities?
    11·1 answer
  • Find the slope of -3/5x-1
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!