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
miss Akunina [59]
3 years ago
13

Solve system by elimination -5x-10y=-20 10x+10y=0

Mathematics
2 answers:
bekas [8.4K]3 years ago
7 0

Answer:

(-4,4)

Step-by-step explanation:

-5x-10y=-20

10x+10y=0

divide both sides by 2

-5x-10y=-20

5x+5y=0

that makes

-5y=-20

divide both sides by -5

y=4

now substitute 4 for y

10x+10 x 4=0

multiply

10x+40=0

subtract

10x=-40

divide

x=-4

IrinaK [193]3 years ago
7 0
X=2 and y= -2 , i hope this helped you...
You might be interested in
Suppose that you are asked to conduct a study to determine whether smaller class
weeeeeb [17]

Answer:

a. correlation

b. inverse linear correlation exists If the higher the population of students lead to a decrease in test score,

c. yes

Step-by-step explanation:

a. Correlation is a measure of the amount of association existing between two variables.

b. For linear correlation, if points are plotted on a graph and all the points lie on a straight line, then perfect linear correlation is said to exist. When a straight line having a positive gradient can reasonably be drawn through points on a graph positive or direct linear correlation exists,

Similarly,when a straight line having a negative gradient can reasonably be drawn through points on a graph, negative or inverse linear correlation exists,

The results of this determination give values of r lying between +1 and −1, where +1 indicates perfect direct  Positive linear correlation and −1 indicates perfect inverse correlation or Negative linear correlation and 0 indicates that no correlation exists.

If the higher the population of students lead to a decrease in test score, there will definitely be a negative correlation between class size and test score. i.e low class size result in high test score which consequently lead to high performance.

c. YES

A negative correlation means low class size result in high test score which consequently lead to better performance.

8 0
3 years ago
What is 21 1/4% expressed as a fraction? 13/200 17/80 21/80 17/40
natta225 [31]
The answer is 17/80
Step by step:
Move decimal 2 to the left,
.2125
Then:

2125
____
10000
Then just simplify from there
3 0
2 years ago
Find the slope. Please reply if you can help
aliina [53]

Answer:

1/1 because you go up 1 and over 1

7 0
3 years ago
Read 2 more answers
.3% of what number is 4.8?
frutty [35]

Answer:

1600

Step-by-step explanation:

0.3% of 1600 will result to 4.8

6 0
3 years ago
A specific laptop loses half of its value every six months. If the original cost was $1000 and the value of the laptop is now $6
mafiozo [28]

Answer:

Sigh no body wants to answer this one, so I'll just take my points back

4 0
3 years ago
Other questions:
  • The graph of a limacon curve is given. Without using your graphing calculator, determine which equation is correct for the graph
    7·1 answer
  • How many sides does a nonagon have?
    14·1 answer
  • compare the decimal 6324. 50 as 6003 24.5 what comparison is correct 6, 3 24. 50 equals 6, 3 24.5 or 6003 24. 50 is greater than
    15·1 answer
  • A wholesaler buys a pair of sunglasses for $5.50 each. He then marks up the wholesale cost 80% to create a retail price for his
    10·1 answer
  • Write the pair of fractions as a pair of fractions with a common denominator 2/4 and 7/8
    13·1 answer
  • What is the value of the function when x = 1?
    10·1 answer
  • The slope of a vertical line is<br> The slope of a horizontal line is
    14·1 answer
  • Mr. Burdzy has a bowl of M&amp;Ms. His least favorite color of M&amp;M's is brown, so there are a lot of brown M&amp;Ms left in
    5·2 answers
  • Pls answer for brainlest and 50 points PLEASE EXPLAIN <br><br> In image
    12·2 answers
  • I believe you need to use the quadratic formula for this one, but I am not sure!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!