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
umka2103 [35]
3 years ago
7

12x=76-20y 8x=84-20y

Mathematics
1 answer:
levacccp [35]3 years ago
4 0

Answer:

<h2>x = -2, y = 5 → (-2, 5)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}12x=76-20y&\text{change the signs}\\8x=84-20y\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-12x=-76+20y\\8x=84-20y\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-4x=8\qquad\text{divide both sides by (-4)}\\.\qquad x=-2\\\\\text{put the value of x to the second equation}\\\\8(-2)=84-20y\\-16=84-20y\qquad\text{subtract 84 from both sides}\\-100=-20y\qquad\text{divide both sides by (-20)}\\5=y\to y=5

You might be interested in
If f(x) = x-1/3 and g(x) = 3x+1 what is (fog)(x)
marin [14]

Answer:

if you meant  f(x) = (x - 1) /3    then   f (g(x) ) = x

of if you meant  f(x) = x - (1/3) then  f(g (x)) =   3x + 2/3

Step-by-step explanation:

f(x) = x-1/3 and g(x) = 3x+1 what is (fog)(x)

f ( g(x) ) =  (3x + 1)  - (1/3) =   3x  + 2/3

Or

if you meant  f(x) = (x - 1) /3    then   f (g(x) ) = x

of if you meant  f(x) = x - (1/3) then  f(g (x)) =   3x + 2/3

3 0
3 years ago
Emma ran 4 1/2 miles. For 3/4 of her run,she ran uphill. How many miles did she run uphill?
Gemiola [76]

Answer:

its c hope it helps not totally sure but yeah

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
The city of Atlanta plans to hold a parade after the Atlanta Falcons win the Super Bowl. They intend to allow fans to watch from
erastovalidia [21]

Answer:

17600 people.

Step-by-step explanation:

Given that The parade route will be 1 mile long (5,280 feet are in a mile) and the sidewalks are 10 feet deep.

The area of the parade route will be

5280 × 10 = 52800 ft^2

If the average person takes up 3 square feet of space, then, divide the area by 3. That is,

52800 / 3 = 17600 people.

Therefore, the estimate for the number of people who can attend the parade will be 17600 people.

7 0
3 years ago
3. Identify each following representation as a function or nonfunctional and explain your reasoning.
Vaselesa [24]

Answer:

1.1

Step-by-step explanation:

I think it.

7 0
3 years ago
Read 2 more answers
A small class has 9 students, 4 of whom are girls and 5 of whom are boys. The teacher is going to choose two of the students at
Mazyrski [523]
20/72 = 10/36 = 5/18
5 0
3 years ago
Other questions:
  • Find the quotient 5/18 divided by 2/6
    6·1 answer
  • How to find the area of a equilateral triangle that has a perimeter of 21?
    5·1 answer
  • 5, 392, 029, 004 in word form
    10·2 answers
  • Evaluate the expression 3(7 + 4)2 − 14 ÷ 7. 50 361 363 586
    15·2 answers
  • Jackson purchased a pack of game cards that was on sale for 22% off. The sales tax in his county is 6%. Let y represent the orig
    15·2 answers
  • The author received a total of $195,000 for the book sales. How many hardcover books were sold? Type in numbers only.
    12·1 answer
  • Ralph’s shirt company sells t-shirts for $7.50 each with a flat rate of $10 for shipping. Frank’s t-shirt company sells t-shirts
    6·1 answer
  • If -1 is one of the zeroes of py 3x^3-5x^2-11x-3 find other zeroes
    15·1 answer
  • Kathleen wants to plant a small vegetable garden in her yard. She fences off a rectangular area with a length of 25.75 feet and
    8·1 answer
  • Robert usually earns $95 per week for
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!