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
icang [17]
3 years ago
7

Multiply each equation by a number that produces opposite

Mathematics
1 answer:
OLga [1]3 years ago
6 0

Answer:

Step-by-step explanation:

We could multiply the first equation by -3 and, separately, multiply the second equation by 4.  The result would be:

-12x - 15y = -21

12x  - 8y = -48

the x terms now cancel.  The result is:

- 15y = -21

- 8y = -48

----------------

-23y = -69, or y = 3.  If y = 3, then 3x - 2y = -12 becomes:

3x - 2(3) = -12, or

3x - 6 = -12, or    3x = -6, and so x = -2.

The solution is (-2, 3).

You might be interested in
Valerie is making identical quilts for herself and her sister. For each quilt she buys 5 yards of solid fabric and w yards of pr
Nadusha1986 [10]
Valerie bought 18yrds of fabric. If she used 9yrds of fabric on her quilt, she will use another 9yrds on her sister's. The total is 18yrds.
8 0
3 years ago
The equation y=0.5x+40 represents the monthly cost y in dollars of Lesley's cell phone, where x is the of talk minutes over 750
Firdavs [7]
You already have the equation given which is <span>y=0.5x+40. To graph, you just have to replace random values of x to determine the corresponding values of y. Plot these points and connect them. The graph is shown in the attached picture. As you can observe, the range starts from y=40. This is because the y-intercept is 40. So, you don't have to show the y-values below because it would just minimize your linear graph.</span>

7 0
3 years ago
If 5 hamburgers cost $10, what is the cost for 3 hamburgers?
mestny [16]

Answer: 6$

Step-by-step explanation: 5 divided by 10 = 2$ so 3 x 2 = 6

I do not hold responsibility if you get it wrong :(

6 0
3 years ago
2( 1/5 m− 2/5 )+ 3/5
Liula [17]

Answer:

2m/5-1/5

Step-by-step explanation:

2*m-2/5+3/5

2(m-2)/5+3/5

2(m-2)/5+3/5

2m-4/5+3/5

2m/5-1/5

7 0
3 years ago
A store buys 12 sweaters for $96 and sells them for $264. How much profit does the store make per sweater?​
Nata [24]

Answer:

14$ per sweater

Step-by-step explanation:

264 - 96 = 168

168 / 12 = 14

6 0
3 years ago
Other questions:
  • 2) X and Y are jointly continuous with joint pdf
    12·1 answer
  • There are 6 red marbles, 5 green marbles, and 4 yellow marbles in a bag. If Joe picks 2
    12·1 answer
  • Write the expression for when you translate the graph of y = | 1/2x − 2 + 3 | a) one unit up, b) one unit down, c) one unit to t
    12·1 answer
  • BRAINLIEST <br><br> which expressions are polynomials select each correct answers
    14·1 answer
  • The hourly earnings (in dollars) for a sample of 25 railroad equipment manufacturers are:15.60 18.7514.60 15.8014.3513.90 17.501
    9·1 answer
  • Marcy went to gap to buy a new pair of jeans the jeans s were originally $86
    6·1 answer
  • How do you Convert the angle 5π/2​ radians to degrees.
    8·1 answer
  • Which mathematical concept did you use to find the number of gumballs that fit INSIDE the package?
    12·1 answer
  • Given the following information, write the equation of the line in slope-intercept form. Slope = -8 and y-intercept = 4
    14·1 answer
  • The lengths of the sides of a triangle are 9​, 12​, and 15. Classify the triangle as​ acute, right, or obtuse.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!