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
Mila [183]
3 years ago
15

X + 5y = 28 - x - 2y = -13

Mathematics
1 answer:
bazaltina [42]3 years ago
8 0

Answer:

x=3

y=5

Step-by-step explanation:

x+5y=28 (i)

-x-2y=-13. (ii)

add equation 2 from equation 1

x+5y=28

-x-2y=-13

3y=15

y=5

put the value of y in equation 1

x+5y=28

x+5*5=28

x+25=28

x=28-25

x=3

You might be interested in
HELP ME PLEASEEEEEEEEEE
Alex_Xolod [135]

Answer: The total amount the water change was -28 gallons by the end of the week <u>OR</u> The total amount the water changed decreased 28 gallons by the end of the week. Depending on how you want to word it.

Hope this helps!

Step-by-step explanation:

<u>Create you equation:</u>

x = the total amount the water changed

d = the amount of days

x = -4d

<u />

<u>Insert the known information into the equation and solve:</u>

x = -4d

x = -4(7)

x = -28

4 0
2 years ago
A ladder is leaning against the top of
Dafna11 [192]

Answer:

Step-by-step explanation:

Discussion

You are working with the Cosine of the angle.

Hypotenuse = 12.5

Base = 3

Theta = ?

Solution

Cos(theta) = base / hypotenuse         Substitute values

Cos(theta) = 3 / 12.5                            Divide  

Cos(theta) = 0.24                                  Tale the inverse cos

theta = cos-1(0.24)

theta = 76.11 degrees

6 0
2 years ago
Read 2 more answers
What are LOGARITHMS...???​
Maslowich

Step-by-step explanation:

A logarithm is a mathematical operation that determines how many times a certain number, called the base, is multiplied by itself to reach another number. ... Logarithms even describe how humans instinctively think about numbers.

3 0
3 years ago
Read 2 more answers
PLEASE HELP ME
OleMash [197]

Answer:

wait do you still need the answer?

6 0
3 years ago
Find the mean of the data set: 9 4 7 3 10 9
almond37 [142]
To find the mean, add up at the numbers and divide by the number of numbers in the set (6)

9 + 4 + 7 + 3 + 10 + 9 = 
9 + 11 + 12 + 10
20 + 22
42 

42 / 6 = 7

the mean is 7.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Rewrite the following equation in slope intercept form<br><br> 14x+13y=12
    7·1 answer
  • Complete the sentence using one of the words below in 10/6 the 10 is the
    13·1 answer
  • Please answer. I have a couple more questions, and if you're willing to answer them please pm me!
    10·1 answer
  • A bag contains 24 cookies: 6 vanilla, 6 chocolate, and 12 oatmeal. What is the probability that a vanilla is randomly selected?
    8·2 answers
  • NEED ANSWER NOW..NEED CORRECT ANSWER WILL MARK BRAINLIEST..
    14·2 answers
  • Multiply the polynomial
    8·1 answer
  • AlI of the following are equivalent except ______.
    12·1 answer
  • Find an<br> expression which represents the sum of (8x - 7) and (10x + 3) in<br> simplest terms.
    8·1 answer
  • Write an equation for the nth term of the arithmetic sequence. Then find a40.
    13·1 answer
  • Please help me and explain the anwser
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!