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
ki77a [65]
3 years ago
9

The equations were multiplied by constants and added together to determine that the value of x in the system of equations is –20

. One-fifth x minus one-third y = negative 1 Negative three-fourths x + one-third y = 12 What is the value of y? –15 –9 9 15
Mathematics
1 answer:
Misha Larkins [42]3 years ago
8 0

Answer:

Step-by-step explanation:

Given:

1. 1/5x - 1/3y = -1

2. -3/4x +1/3y = 12

Multiplying equation 1 by 15 and equation 2 by 12

3. 3x - 5y = -15

4. -9x + 4y = 144

and then Solving both equations simultaneously, since x = -20 as stated in the question and by confirmation,

Using equation 3 or 4 to solve for y,

3(-20) - 5y = -15

-5y = 60 - 15

y = 45/-5

= -9

y = -9

You might be interested in
Solve.
jekas [21]
<span>A. {+8) is the answer
</span>
6 0
3 years ago
A box contains 19 large marbles and 11 small marbles. Each marble is either green or white. 6 of the large marbles are green, an
Anastaziya [24]
9 because if you subtract 11 from 19 you het 9
4 0
3 years ago
Jack has two square based pyramids that are the same size.he stick the square faces togather to make a new 3-d shape.how many fa
RideAnS [48]
I think it's
8faces and 6edges?
6 0
3 years ago
Karen is buying pens and pencils for the new school year. She wants to have no more than 25 writing utensils in all. She also wa
bezimeni [28]
For this case, the first thing we must do is define variables.
 We have then:
 x: number of pens
 y: number of pencils
 We now write the system of inequations:
 x + y  \leq  25&#10;&#10;y  \geq  (x - 3) ^ 2&#10;
 The solution to the system of inequations is given by the shaded region.
 Note: see attached image.

3 0
3 years ago
PLEASE ANSWER!! DUE IN A FEW MINUTES!! DON'T FORGET TO SHOW YOUR WORK AS WELL!!!!!!!!
IrinaK [193]
I’ve attached my work
Hope it helps!

5 0
3 years ago
Other questions:
  • the volume of a pyramid is 84 cubic feet. the area of the base is 21 square feet. find the height of the pyramid
    6·1 answer
  • What is 5 5/8 + 6 1/4
    15·2 answers
  • How to simplyfi the fraction 9/11 in simplest form
    15·1 answer
  • 5. Cardi B is buying packs of gum from the grocery store. The table shows the total cost of the gum based on the number of packs
    13·1 answer
  • Jennys room is 13 feet long and 12 feet wide, Ruth's room is 14 feet long and 11 feet wide, whose room has the greater area?
    5·1 answer
  • The question= find the percent of each number
    7·1 answer
  • PLZZZZZZ HELP ME!!!!!!!<br><br> 15 x 5x
    8·2 answers
  • Solve for b:<br> 6b + 6b + 9 -9 = 4(3b)
    11·1 answer
  • Find the cost of carpeting a 9 foot by 12 foot room at $30 per square yard.
    12·2 answers
  • Which list contains values that are all part of the solution set of the graphed inequality? 2, 1, 3. 9, 4 2001. 3, 4, 0, 2. 6 1.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!