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
densk [106]
3 years ago
11

Solve.

Mathematics
2 answers:
lions [1.4K]3 years ago
6 0

Answer:

b=9,a=12

Step-by-step explanation:

I solved by substitution:

b = 3/4a  ---> plug this into the other equation

a + b = 21   is now    a + 3/4a = 21

Reduce: 7/4a = 21

a = 12

Now solve for b:

b=3/4a is now b=3/4(12)

b=9

Setler [38]3 years ago
6 0

Answer:

a=12 b= 9

Step-by-step explanation:

did the quiz

You might be interested in
Carlota has 3/4 ton of mulch she is going to divide evenly among 5 flower beds. How much mulch will each flower bed contain? Ple
Murljashka [212]
The first thing to do is to turn 5 into a fraction.  
5 = 5/1

Now it is just a simple fractional division question: 
3/4 / 5/1

With fractional division, all you do is switch around the fraction that is on the right and turn the divide sign into a multiplication sign: 
3/4 X 1/5

Now you simply multiply the numerators together, and the denominators together: 
3 X 1 = 3
4 X 5 = 20

3/20. 

Each flower bed will contain 3/20 of a ton of mulch. 

5 0
2 years ago
Which of these triangle pairs can be mapped to each other using a single translation?
sergeinik [125]

Answer:- D shows the triangle pairs which can be mapped to each other using a single translation.


Explanation:-

Translation is a rigid transformation which creates a congruent image as that of the original figure such that the distance between the each point of the original figure and the image is fixed and same.

The translation mapping is given by (x,y)→(x+h,y+k) ,where h is the distance of the x coordinate of the each point of the original figure to the image and  k is the distance of the y coordinate of the each point of the original figure to the image.

In figure D we can see that the distance between each point of ΔCED is equal to the distance between each point of ΔMPN. Thus it shows  the triangle pairs which can be mapped to each other using a single translation.


4 0
3 years ago
Read 2 more answers
Help me plz i don't even know if the first one is correct
dimulka [17.4K]

Here's what i got:

Answer:

A)

<u><em>2.2 * 10^7</em></u>

B)

<u><em>0.072 = 7% are female</em></u>

C)

0.10455 * 22,000,000 = C

<u><em>0.10455 * 22,000,000 = 2,300,100</em></u>


D)

<u><em>0.0195 = 2% of the living veterans served in both. </em></u>





4 0
3 years ago
The area of a square battlefield was 22,500 square miles. How long will it take a group of soldiers to cross the field diagonall
VARVARA [1.3K]
\sqrt{22500} = s&#10;\\\ diagonal = s \sqrt{2}&#10;\\\ s = 150, \ diagonal = 150\sqrt{2}&#10;\\\ diagonal \approx 212.132&#10;\\\ 212.132/3.2 \approx 66.291 \ hrs
6 0
3 years ago
Find the length of AC
Ratling [72]
Answer 5 because cos(60) x 10 = gives 5
3 0
2 years ago
Other questions:
  • You and your friend share a paper route you can deliver 4 papers in one minute
    12·1 answer
  • Describe the pattern that you see. In your description, include the shapes that create the pattern. You can also mention colors.
    13·1 answer
  • Determine whether each number could be the probability of an event. Explain your reasoning.
    5·1 answer
  • Which equation matches the graph
    7·1 answer
  • Jason spent $980 total on a new Ps5 and some games. He paid $800 for the Ps5 and he paid $45 per game. How many games did Jason
    13·2 answers
  • If using the method of completing the square to solve the quadratic equation x^2-13x+14=0, which number would have to be added t
    14·1 answer
  • How many solutions does the equation 3x − 7 = 4 + 6 + 4x have?
    9·2 answers
  • PLS HELP ASAP !!! WILL MARK BRAINLIEST !!
    10·2 answers
  • Solve this problem pls don't spam​
    6·1 answer
  • Part A
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!