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
Dmitrij [34]
4 years ago
14

Solve the system of linear equations by elimination −2x+3y=7 and 5x+8y=−2

Mathematics
1 answer:
Charra [1.4K]4 years ago
7 0

Hey!

Here's how you would solve it with elimination:

-2x + 3y = 7

5x + 8y = -2

Multiply first equation by 5 and the second one by 2:

-10x + 15y = 35

10x + 16y = -4

Add the two equations:

-10x + 15y = 35

+

10x + 16y = -4

------------------------

31y = 31

y = 1

Plug this back into one of the original equation:

5x + 8y = -2

5x + 8(1) = -2

5x + 8 = -2

5x = -10

x = -2

Now you have your answer:

y = 1

x = -2

You might be interested in
Kent worked in the houseware section of a department store. This year he set a record high for vacuum sales with567 vacuum sold.
Gemiola [76]
First subtract the original high from the new high:
567 - 540 = 27 more vacuums sold.

Now divide the increase amount by the original high and multiply that by 100 to get the percentage:

27 / 540 = 0.05

0.05 * 100 = 5% Increase.
5 0
3 years ago
Yesterday's afternoon temperature was 21°F. It plunged overnight to -3°F. How many degrees did the temperature drop? A) 3° B) 18
LiRa [457]

Answer: B) 18° C

Step-by-step explanation:

21+(-3) = 21 - 3

            = 18

7 0
3 years ago
Read 2 more answers
A student must find the slope of a line that passes through the points (2.2) and (-1, 3). Which of the statements
Evgesh-ka [11]

Answer:

A

Step-by-step explanation:

the formula of the slope is (y2 - y1)/(x2 - x1)

slope = (3-2)/(-1-2) = 1/(-3) = -1/3

6 0
3 years ago
I need help please. Thank you.
AfilCa [17]
The answers are C and B.
Answer A has infinite solutions, and D has no solutions
8 0
3 years ago
Solve for d.<br> 3d - d - 1 = 5<br><br> HELP
Alina [70]

Answer:

d=3

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Solve the proportion for n: 4.5/n = 27/37.8
    15·1 answer
  • the area of a desktop is represented by x^2 - 49. find the dimensions of the desktop in terms of x. show work please.​
    15·1 answer
  • How to solve (5/6-1/6)-1/12
    7·1 answer
  • John's monthly salary is 7,000. If John deposits 0.75 of his paycheck into a savings account. How much money does he put in his
    15·1 answer
  • Solve for x*<br> (17x - 8)
    5·1 answer
  • Plz help in math: write an expression so that the product of a whole number and a decimal is 0.28.
    6·1 answer
  • ¿cuales números naturales de dos cifras cumplen la condición de que su triple disminuido en 5, sea menor que su doble aumentado
    5·1 answer
  • The times to pop a 3.4-ounce bag of microwave popcorn without burning it are Normally distributed with a mean
    8·1 answer
  • Ajdjsjnsjsjdjxhdjdjdjdjdjsjsjsjssjs
    8·1 answer
  • $274 for 40 hours of work as a unit rate
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!