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
marysya [2.9K]
2 years ago
9

Solve both by elimination can someone help? 2x-5y=-9 , 4x+5y=12 3x-2y=12 , 7x-5y=17

Mathematics
1 answer:
lyudmila [28]2 years ago
8 0

Answer:

x=1/2, y=2;    

Step-by-step explanation:

First pair:

2x-5y =-9

4x+5y=12

Add them together:

6x=3

x = 1/2

2(1/2) - 5y =-9

1-5y = -9

1+9=5y

y=10/5=2

You might be interested in
lisa had 1,750 stamps. Minah had 480 stamps fewer stamps than lisa. Lisa gave some stamps to Minah. Now, Minah has 3 times as ma
lys-0071 [83]
Lisa made up to 2230 stamps

3 0
4 years ago
Identify Variables
loris [4]

Step-by-step explanation:

<u>Substitute x = 12 and y = 4 into the equations:</u>

<u>1.</u>

12 + 4 = 12

Incorrect.

<u>2</u><u>.</u>

12 + 4 = 4

Incorrect.

<u>3</u><u>.</u>

12 - 4 = 12

Incorrect.

<u>4.</u>

12 - 4 = 4

Incorrect.

All equations are incorrect when x and y are substituted.

7 0
2 years ago
Jessica has two salary options. She can earn a salary of $500 per week plus 2% of the weekly sales or a salary of $200 per week
Yuki888 [10]

Answer:

$500 + 0.02x = $200 + 0.05x  

Step-by-step explanation:

Jessica's first option:  J1 = $500 plus sales commission of 2%:

                                     J1 = $500 + 0.02x, where x:  weekly sales amount

Her second option:  J2 = $200 + 0.05x

Equating these two expressions, we get:

$500 + 0.02x = $200 + 0.05x  

... which is the same as the third answer choice.

5 0
3 years ago
This week in school, there is a 75 percent probability of having a fire drill, a 50 percent probability of a tornado drill,
vova2212 [387]

Answer: A (edg2020)

     

8 0
3 years ago
I don't know how many gallons are in a quart so.. can someone help me please?
Bumek [7]
0.25 gallons are in a quart does that anwser your question

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the area of the parallelogram?<br><br>Any help will be appreciated. Thank you!☺️​
    12·2 answers
  • What is 3x+5y=40 in slope intercept form
    10·1 answer
  • The equation for the line of best fit for a data set is y = 2x + 1.5. If the point (1, 4) is in the data set, what is the residu
    14·2 answers
  • Assume that 12 people, including the husband and wife pair, apply for 4 sales positions. People are hired at random.
    8·1 answer
  • Light travels at the speed of approximately 3.0 × 108 meters per second. Find the time in minutes required for light to travel f
    12·1 answer
  • A family has four children. If the genders of these children are listed in the order they are born, there are sixteen possible o
    12·2 answers
  • Find the volume of a pyramid with a square base, where the area of the base is 16\text{ m}^216 m
    15·1 answer
  • Lorenzo made 2/3 of a quart of hot chocolate. Each mug holds 1/6 of a quart. How many mugs will Lorenzo be able to fill?
    13·2 answers
  • Round 8.6 to the nearest whole number​
    15·1 answer
  • Which of the following has eight faces?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!