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
kondor19780726 [428]
3 years ago
7

The sum of two numbers is 18 their difference is 8

Mathematics
2 answers:
Anna007 [38]3 years ago
4 0

When we write out the system of equations, we will get:

x+y=18

x-y=8

 We can then use elimination to get just one variable.

 x+y=18

+x-y=  8

 Which gives us:   2x=26

 We then divide by 2 and get:    x=13

 We next plug that into one of the two equations and solve for the other variable:    (13)+y=18

We subtract 13 from both sides and get:   y=5

So the two numbers are 13 and 5.

~ I hope this helped, and I would appreciate Brainliest. ♡ ~ ( I request this to all the lengthy answers I give ! )

hram777 [196]3 years ago
3 0

<em><u></u></em>

<em><u>Answer:</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>13 and 5</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>Step-by-step explanation:</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>x+y=18</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>x-y=8</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>_____</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>2x=26</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>x=13</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>So the first number must be 13</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>13+y=18</u></em>

<em><u></u></em>

<em><u></u></em>

<em><u>y=5</u></em>

<em><u></u></em>

<em><u></u></em>

<u><em>And the second number must be 5</em></u>

You might be interested in
Lucy rides her bike 20 kilometers every week. How many kilometers does Lucy ride her bike in 7 weeks
lutik1710 [3]
Lucy ride 140 kilometers in 7 weeks :)
8 0
3 years ago
Read 2 more answers
Richard’s checking account balance was $57.34 at the beginning of the week. During the week, he recorded the transactions below.
Tomtit [17]

Answer:

US$ 132.45

Step-by-step explanation:

See attachment for the missing table.

Given:

Richard’s checking account balance at the beginning of the week = $57.34

<u>Richard’s account balance at the end of the week from the given table:</u>

Deposits of the week = US$ 163.75

Expenses of the week = Groceries + Credit card bill + Gas

Expenses of the week = 25.37 + 50 + 13.27

Expenses of the week = US$ 88.64

Richard’s account balance at the end of the week = Richard’s checking account balance at the beginning of the week + Deposits of the week - Expenses of the week

Replacing with the real values:

Richard’s account balance at the end of the week = 57.34 + 163.75 - 88.64

                                                                                    =US$ 132.4

7 0
3 years ago
Read 2 more answers
The left and right page numbers of an open book are two consecutive integers whose sum is 321
PIT_PIT [208]

Answer:

160,160

Step-by-step explanation:

let the first page be X

second one be x+1

x+x+1=321

2x=320

x= 320÷2=160

pages 160 161

6 0
3 years ago
On which number line are —4 and it’s opposite shown
serg [7]

i think its d! hope that helps! is that flvs?


6 0
3 years ago
Read 2 more answers
In 1979, zoologists estimated the number of fish in a local pond to be about
rewona [7]

Answer:

693 fish

Step-by-step explanation:

In 10 years, we can tell that the amount of fish increased by 1.833...(990 divided by 540) times. If we divide 1.833... by 10, we can find how much the pond increases by yearly. we get 0.1833... If we multiply that by 7 (because the gap between 1986 and 1979 is 7 years), we get 1.2833... So, if we multiply 540 by 1.28333..., we get 693 fish.

4 0
3 years ago
Other questions:
  • PLEASE HELP ME!!! A restaurant uses 4⁄5 ounce of gravy for each serving of meat loaf. If 45 people ordered meat loaf, how much g
    6·2 answers
  • What is 4.51 rounded to nearest whole number
    8·2 answers
  • If 65 people apply for a job and the employer is hiring 10% of those who applied, what is the likely hood that you will get a jo
    11·1 answer
  • What is the answer to 2/2 divided by 3
    14·2 answers
  • Factor 7x^4 - 63<br><br>please I can't afford to fail my homework
    8·1 answer
  • Write 40ab^2/5ab in simplest form
    12·1 answer
  • Which list shows the following numbers in order from least to greatest?
    7·1 answer
  • A stockholder sold her shares and made a profit of $1,327. If that is a profit of 22%, how much were the shares worth when she o
    7·1 answer
  • Va rog ajută <br>va dau 100 puncte și coroana​
    12·2 answers
  • Please help! will give brainliest
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!