Sign In
Ask Question
Dakota Mcguire
Mathematics
19 November, 14:57
3 х - 10 y = -70
4 х + 9y = 63
+3
Answers (
1
)
Jennifer Arias
19 November, 15:12
0
(0,7)
Step-by-step explanation:
(I'm assuming you have to solve the system of equations)
3x - 10y = - 70
4x + 9y = 63
Solving by elimination.
Eliminate x first, so we need the x-component of both equations to have the same number but opposite sign. So i'm going to multiply the first by - 4 and the second by + 3.
//I could have also done + 3 to first and - 4 to second
-4 (3x - 10y = - 70)
3 (4x + 9y = 63)
-12x + 40y = 280
12x + 27y = 189
Add the equations / /x's cancel
67y = 469
Divide both side by 67, y=7
Plug in y into any original equation to solve to x
3x - 10 (7) = - 70
3x - 70 = - 70
3x = 0
x=0
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“3 х - 10 y = -70 4 х + 9y = 63 ...”
in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
Daniela rented a car. She paid a flat rate for the day, plus a cost per mile charge. The expression 0.15x+220.15x+22 represents the amount Daniela paid.
Answers (1)
9x + 7y = 10 7x + 7y = 14
Answers (2)
A pair of gym shoes are on sale for 51$ this is 75% of the original price. What was the original price
Answers (1)
How to simplify using distributive - 8 (x + 4)
Answers (1)
How many 3/8 are in 3?
Answers (1)
New Questions in Mathematics
A train travels at 80 miles per hour. An equation can be written that compares the time (t) with the distance (d). What is the domain and range?
Answers (1)
A clock's battery is running low. Every 6 hours, it slows down by 1 hour. By how much does it slow down in 1 hour?
Answers (1)
Between 2000 and 2010, the percentage of households with cordless phones increased by 12.9% to 86%. What percentage of households had cordless phones in 2000
Answers (1)
A box of old books contains 6 mysteries, 4 biographies, and 2 children's books. Which of the following can be used to determine the probability of choosing a mystery book from the box, replacing it, and then choosing a biography?
Answers (1)
Surveys are used for a variety of studies, particularly when the population is large. Why?
Answers (1)
Home
»
Mathematics
» 3 х - 10 y = -70 4 х + 9y = 63
Sign In
Sign Up
Forgot Password?