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
Juli2301 [7.4K]
3 years ago
15

The sum of two numbers is 21.

Mathematics
2 answers:
mafiozo [28]3 years ago
7 0

Answer:

Pretend that x and y represents the 2 numbers that we need to find.

According to the information, we know that:

x + y = 21

6x = y

Replace y in the first equation with 6x (because they are equal to each other according to the second equation):

x + y = 21

x + 6x = 21

7x = 21

x = 21/7 = 3

Now have two ways to find y, both will give us the same result:

3 + y = 21 ⇔ y = 21 - 3 = 18

6 · 3 = y ⇔ y = 18

So the numbers that we need to find are 3 and 18.

klio [65]3 years ago
7 0

Answer:

3 and 18.

Step-by-step explanation:

If one number is x then the other is 6x.

So, x + 6x = 21

7x = 21

x = 3.

The other number is 21 - 3 = 18.

You might be interested in
12x + 3x = ___? Please explain
Paladinen [302]

Answer:15x

Step-by-step explanation:you add 12 + 3 which equals 15 and then you just carry the x over

6 0
3 years ago
Find the length of the missing angle
amm1812

Answer: x=7.21

Step-by-step explanation: This is a right triangle- remember the Pythagorean theorem: a² + b² = c². To find leg a, you'd use a = √(c² - b²) **leg a would be the side that is labeled with 12. To find leg b, you'd use b = √(c² - a²) *this is the equation we need. To find the hypotenuse, or <em>c</em>, you'd use c = √(a² + b²). This equation works for right triangles only.

Hope this helps :)

4 0
3 years ago
Darrien read 97 pages last week.Evan read pages last week.How many 8 my 6. pages did, the boys read?
const2013 [10]
I’m really confused about this
7 0
3 years ago
An airplane on autopilot took 8 hours to travel 5,744 kilometers. What is the unit rate for kilometers per​ hour?
guajiro [1.7K]

Answer:718 kilometers per hour


Step-by-step explanation:


6 0
3 years ago
Read 2 more answers
6x-4y=8 solve for variable x
Radda [10]
6x - 4y = 8...solve for x
6x = 4y + 8
x = (4/6)y + 8/6
x = 2/3y + 4/3 <==
8 0
3 years ago
Other questions:
  • which pair of expressions has the same value a (2)(-8) and 2-18 b (-2)(8) and 18+(-2) c 2(8) and 2+18 (-2)(-8) and 2+(-18)
    6·1 answer
  • The quotient of a triple number &amp; four
    14·1 answer
  • Graph the equation to solve the system y=2x-3 y=x+6
    8·1 answer
  • I need help with this one ​
    7·1 answer
  • PLZZZZ HELPPP ILL GIVE ALL CREDIT AND POINTS
    7·1 answer
  • in Aprils DVD collection she has 8 action dvds 12 comedy DVDs 7 romance DVDs what percent of April's DVD collection are comedies
    14·1 answer
  • -2a2-4a+16 cuando a=-2​
    12·1 answer
  • <img src="https://tex.z-dn.net/?f=%28%20%5Cfrac%7B8%7D%7B11%7D%29%20%7B%7D%5E%7B7%20-%202%20%5Ctimes%203%20-%201%7D%20" id="TexF
    5·1 answer
  • Who can answer this Algebraic Expression for me?<br><br>3(m-5)+m​
    9·1 answer
  • Can someone please help me with all of these. And thank you.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!