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
taurus [48]
3 years ago
8

A first number plus twice a second number is 5.twice the first number plus the second totals 31.find

Mathematics
1 answer:
givi [52]3 years ago
8 0
So if I understand this correctly, this would look something like this:


A first number

let's call it x

 plus twice a second number

let's call the second number y:

x+2y=5

 is 5.

this means that x=5-2y!


twice the first number plus the second totals 31.

2x+y=31

from the last one, i know that y=31-2x

and i can insert it into the first equation:

So i know that x=5-2y

and that

2x+y=31
i will substitute x here

2(5-2y)+y=31

remove the bracket

10-4y+y=31


10-3y=31

remove 10 from both sides

-3y=21

then

y=-7

and
x=5-2(-7)=5+14=19



You might be interested in
1 nnnnnnnneeeeeeeeeeeed help
zavuch27 [327]
Answer is 84.86 cm^2
8 0
2 years ago
− 4n = -1 3− 4n - 18
Lady_Fox [76]

Answer:

0=-31

Step-by-step explanation:

7 0
3 years ago
What is the 8th term of 6,2,2/3
devlian [24]

Answer:

2/729

Step-by-step explanation:

I think that is the answer I hope it helps

3 0
2 years ago
I want to purchase a pair of sneakers for the summer. Champs and Footlocker
SCORPION-xisa [38]

Answer:

Champs is 64.8, Footlocker is 64. Footlocker is selling them for cheaper. You would go to Footlocker, as it's .8 off.

7 0
3 years ago
Find the number the comes next 1.2.6,21.88,?​
Nataly_w [17]

Answer

455

Step-by-step explanation:

(1×1) + 1 = 2

(2×2) + 2 = 6

(6×3) + 3 = 21

(21×4)+4 = 88

(88×5)+5 = 445

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is the average speed of an object that travels 50 miles in 2 hours?
    12·2 answers
  • adult tickets for the fall play cost $6 and students cost $3. the drama club so 25% more students tickets than adult tickets to
    12·1 answer
  • This says to multiply the special products how do I answer this problem? (x+8)(x-8)
    9·1 answer
  • On what interval is the function f(x) = -2|x + 1| − 3 decreasing?
    12·1 answer
  • PLEASE HELP <br> does anyone know adding equations look at the picture
    7·1 answer
  • Help<br>????????????????????????????????​
    11·1 answer
  • You want to buy a shirt that is originally $32.95. It is on sale for 20% off! What is the shirt's SALE price?
    8·1 answer
  • PLEASE ANWSER CORRECTLY!! I WILL MARK BRAINIEST!!!
    11·1 answer
  • Write pqqqqrr in exponential form.
    15·2 answers
  • Russ is solving an equation where both sides are linear expressions. he sets the expressions equal to y and graphs the system fi
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!