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
Shalnov [3]
3 years ago
9

Solve the system by either substitution or elimination 3x-5y=21 2x+y=1

Mathematics
1 answer:
Bezzdna [24]3 years ago
3 0
Hello

3x - 5y = 21
2x + y = 1

We need to solve 2x+y=1 for y
So now we have, y = -2x +1

Substitute -2x +1 for y in 3x-5y = 21
3x - 5y = 21
3x -5 (-2x+1)=21
3x + 10x -5=  21
13x -5 = 21
13x = 21+5
13x = 26
x= 26/13
x= 2 
Now we have the value of x, with that we can find the value for y
let's do that by substitute 2 for x in y = -2x +1
y = -2x +1
y= -2(2) +1
y= -4 +1
y= -3

Final answer : Y= -3 and x= 2

I hope that's help !
 
You might be interested in
The ages of trees in a forest are normally distributed with a mean of 25 years and a standard deviation of 4. Approximately what
harkovskaia [24]

Answer:

78.88%

Step-by-step explanation:

We have been given that

\mu=25,\sigma=4,x_1=20,x_2=30

The z-score formula is given by

z-\text{score}=\frac{x-\mu}{\sigma}

For x_1=20

z_1=\frac{20-25}{4}\\\\z_1=-1.25

For x_2=30

z_2=\frac{30-25}{4}\\\\z_2=1.25

Now, we find the corresponding probability from the standard z score table.

For the z score -1.25, we have the probability 0.1056

For the z score 1.25, we have the probability 0.8944

Therefore, the percent of the trees that are between 20 and 30 years old is given by

0.8944 - 0.1056

= 0.7888

=78.88%

6 0
3 years ago
Read 2 more answers
How do I simplify an expression
Sladkaya [172]
Start with parentheses first
Afterwards do exponents
Next do either multiplication or division (L to R)
Then Addition and Subtraction (L to R)
__________________________________________
Then solve to find your answer
7 0
3 years ago
Read 2 more answers
800 divided by 10 to the power 3
Blababa [14]
I think that the answer you are looking for is 0.3

7 0
3 years ago
A triangle is drawn and then translated as shown in the diagram. Which statement is true?
abruzzese [7]

Answer:

D

Step-by-step explanation:

Congruent means the same. Translating it just moves it somewhere else.

6 0
3 years ago
Read 2 more answers
Solve the equation or formula for the indicated variable s=6r^3t for t
harina [27]
This is the answer i cant type it so i just snipped it good luck!!!:)

4 0
3 years ago
Read 2 more answers
Other questions:
  • M(-3,2) is the midpoint of rs and r has coordinates (6,0). what are the coordinates of s?
    5·1 answer
  • A photo that is 4 in wide and 6 in high is enlarged to a poster that is 3ft wide and 4 1/2 ft high what is the ratio of the widt
    5·2 answers
  • 2)Katherine is organizing a camping trip. The cost of renting a cabin is
    10·1 answer
  • Simplify. - 4 (3 -1) + 2
    15·2 answers
  • Jayne says that 0.45 is equal to 4/10 is she correct? Explain
    10·2 answers
  • PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!
    6·1 answer
  • Steven is buying a new mountain bike on layaway for $272. If he pays $34 each week, how many weeks will it take Steven to pay fo
    5·2 answers
  • The price of an item has been reduced by 80%. The original price was $95. What is the price of the item now?
    13·1 answer
  • Can someone help with this???
    10·2 answers
  • Write an expression for the sequence of operations described below.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!