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
aksik [14]
3 years ago
9

How to solve the simultaneous equation 3x+7y=26 4x+5y=13

Mathematics
1 answer:
crimeas [40]3 years ago
4 0

Answer:

I found:

x=-3

y=5

Explanation: I would multiply the first equation by −4 and the second by 3 and add together the two equations (in columns):

{−12x−28y=−104

{12x+15y=39


0−13y=−65


So: y=65/13=5


Substitute back this value into the first equation:

3x+7⋅5=26


3x=26−35=−9


x=−9/3=−3

You might be interested in
PLEASE HELP! ((Photo included)
avanturin [10]
10x+148.73=40x+440.83 solve this equation and then insert what u get from x into either y=10x+148.73 or y=40x+440.83 
6 0
4 years ago
A flowerbed surrounds the base of a tree. It’s enclosed by stones to form a circle that measures 25.12 feet. What is the radius
Ymorist [56]
2.83 if rounded. 2.82842712475 would be the actual.

Hope this helped!
5 0
4 years ago
Since school has closed, you have upgraded your internet service. Dragon Quest WiFi
irga5000 [103]
A) y=55x+80
C) y=55(12)+80 = 740$ after a year
B)

6 0
4 years ago
Only number 7 please, and the expression
spin [16.1K]

Answer:

8n, 40 miles in 5 weeks.

Step-by-step explanation:

given that nate runs 8 miles each week.

Hence in n weeks, he will run

8 miles per week x n weeks

= 8n miles

in 5 weeks, n = 5.

Substituting this into the expression,

8(5) = 40 miles

3 0
3 years ago
Help me plz thanks u
Natali [406]
◆ Circles ◆

Hey !!

Check the attachment.
Hope it helps you :)

6 0
3 years ago
Other questions:
  • What is the partial product 16 + 52
    6·2 answers
  • What is the sign of A +B?
    13·1 answer
  • What is the y-value of tan(x) when x = 90°?<br><br> -1<br><br> 0<br><br> 1<br><br> does not exist
    13·1 answer
  • The area of a square is 21 more than its perimeter. find the length of a side.
    10·1 answer
  • Solve the system of linear equations by substitution.What is the solution to x=2y+y and 3x+2y=3
    6·1 answer
  • If h(x)=4X^2-16 were shifted 5units to the right and 2 down, what would the new equation be
    14·2 answers
  • Three teams, A, B and C, play in a competition.
    5·1 answer
  • Question 1 options:
    13·1 answer
  • Help pls geometry volume
    8·1 answer
  • Can someone help me with this?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!