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
Kitty [74]
3 years ago
6

What is the solution of the system?

Mathematics
1 answer:
suter [353]3 years ago
4 0
Solve the following system using elimination:
{7 x + 2 y = -19 | (equation 1)
{2 y - x = 21 | (equation 2)

Add 1/7 × (equation 1) to equation 2:
{7 x + 2 y = -19 | (equation 1)
{0 x+(16 y)/7 = 128/7 | (equation 2)

Multiply equation 2 by 7/16:
{7 x + 2 y = -19 | (equation 1)
{0 x+y = 8 | (equation 2)

Subtract 2 × (equation 2) from equation 1:
{7 x+0 y = -35 | (equation 1)
{0 x+y = 8 | (equation 2)

Divide equation 1 by 7:
{x+0 y = -5 | (equation 1)
{0 x+y = 8 | (equation 2)

Collect results:
Answer: {x = -5, y = 8
You might be interested in
A homeowner must reduce the use of his homes electricity . the home currently consumes 25.7 kwh (kilowatt hours) of electricity
tigry1 [53]
Given:
25.7 kwh of electricity per day.
must reduce 20%

25.7 kwh * 20% = 5.14 kwh   * amount of electricity to be reduced.
25.7 kwh - 5.14 kwh = 20.56 kwh * net of reduced electricity

The homeowner will use 20.56 kwh after reduction of 20%.

8 0
4 years ago
A square has a perimiter of 12x +52 units which expression represents the side length of the square in units
8_murik_8 [283]

Answer:

Step-by-step explanation: One important property of a square is that all the sides of the square have the same length. That means, if a square has a perimeter of P, then one side must have a length of P/4 units. So for a square with a perimeter of (12x + 52) units, its sides would have a length of (12x + 52)/4 = (3x + 13) units. Therefore, the answer is C: (3x + 13) units.

4 0
3 years ago
WHOEVER ANSWERS CORRECTLY WILL BE BRAINLIEST!
GREYUIT [131]

Answer:

A. (125.6 in)

Step-by-step explanation:

R = d / 2 = 40 / 2 = 20 in

Circumference is:

S = 2*π*R=2*3.14*20=125.6 in

4 0
3 years ago
Classify the real number. (Choose all that apply). –9 A.) Rational B.) Whole C.) Irrational D.) Natural E.) Integer
IRISSAK [1]
Whole numbers are the numbers 0, 1, 2, 3, 4 and so on and negative numbers are not considered whole numbers.

natural numbers are called the counting numbers that are the numbers 1, 2, 3, 4, and so on. they are positive numbers and zero is not considered a natural number as you can see.

integers are all the whole numbers and their opposite (negative) but negative numbers are NOT whole or natural numbers. fractions and decimals are not integers.

rational numbers are numbers that include all the integers, plus all fractions, or terminating decimals and repeating decimals.

irrational numbers are an infinite number of digits to the right of the decimal point, without repeating.


so your answer is integer and rational, hope this helped! :)
6 0
4 years ago
Hey, this question is really simple but im a little tired and can't seem to get it.. 25 points and brainliest- please help out.
Nimfa-mama [501]

Answer:1/3

Step-by-step explanation:

It’s 4/12 so divide both numbers by 4 is 1/3

5 0
3 years ago
Read 2 more answers
Other questions:
  • -4(2x-1)>5-3x. HELP!
    6·1 answer
  • a ream of paper contains 500 sheets of paper. Norm has 373 sheets of paper left from a ream. Express the portion of a ream Norm
    9·1 answer
  • A rectangle has a width of 2.45 feet and a length of 6.5 feet. How will the area of the rectangle change if each side is increas
    7·2 answers
  • Unit test<br> 4% of a number is what fraction of that number?
    15·1 answer
  • When trying to find the probability of rolling an even number on a number cube with numbers 1 through 6, how many desired outcom
    11·1 answer
  • Mark has 49 baseball cards and 70 football cards that he wants to group into package.each package will have the same number of b
    15·1 answer
  • a car rental sells accident insurance to 28% of its customers. out of 430 customers, about how many customers are predicted to p
    10·1 answer
  • A weather station on the top of a mountain reports that the temperature is currently 0 degrees Celsius and has been falling at a
    13·1 answer
  • PLEASE HELP!!!
    5·1 answer
  • Opposite of expanded form ​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!