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
Karo-lina-s [1.5K]
3 years ago
9

LINEAR SYSTEM WORD PROBLEM *round answer to the nearest cent*

Mathematics
1 answer:
pshichka [43]3 years ago
3 0
Drinks, x, and popcorn, y.
125.50 = 12y+7x
87.50=6y+8x

To solve for the cost of drinks, x, isolate the variable
125.50 = 12y + 7x
subtract 12y from both sides
125.50 - 12y = 7x
divide both sides by 7
125.50/7 -12/7y = x

plug that into the other equation
<span>87.50=6y+8x
87.50 = 6y + 8(125.50/7 - 12/7y)
Distribute </span><span>8(125.50/7 - 12/7y)
Then combine like terms
then subtract and divide to isolate y</span>
Solve for y
y = 7.25

Plug that into the first equation to solve for x
<span>125.50 = 12y+7x
125.50 = 12(7.25) + 7x
125.50 = 87 + 7x
subtract 87 from both sides
38.5 = 7x
divide both sides by 7
5.5 = x

There, you have the cost of the drinks, $5.5, and the cost of the popcorn, $7.25.

To check: you would plug in what you got for x and y into the original equations and see if they equal right... I did it on paper and it was right!!

Hope this helps</span>
You might be interested in
7. The graph of part of linear function g is shown on the grid. Which inequality best represents the domain of the part shown?​
PSYCHO15rus [73]

Answer:

a

Step-by-step explanation:

Domain means the change in x.

so the domain will be which values of x the fn goes through.

you can see the black line goes from -9 to 2 in x values.

the -9 isn't filled in, but the 2 is. filled in means it will be with an equals instead of without.

so x is between -9 and 2, 2 is with equals -9 is without,

so the first one.

3 0
3 years ago
Please help me in this question.
snow_lady [41]

Answer:

Step-by-step explanation:

(i) Area of ABCD = (base1+base2)*height/2

                           = (6+12)*4/2 = 36 cm2

(ii) Volume = Area of ABCD * length = 36 * 25 = 900 cm3

(iii) Total SA = Area of ABCD *2 + 25*5*2 + 6*25 + 12*25

                    = 72                         + 250      + 150   + 300

                    = 772cm2

3 0
2 years ago
What shape do you get when you plot and join (in order) the following points? (3, 6), (7, 6), (9, 1) and (1, 1) | plz
Lelechka [254]

isosceles trapezoid

....................................

3 0
2 years ago
Read 2 more answers
Which of the following points IS not coplanar with points C. D and E?
valina [46]

R. It is not in the same plane as C, D and E

7 0
3 years ago
What is the answer don't get it
denis-greek [22]
Demoss graphing calculator
5 0
3 years ago
Other questions:
  • How do you factor 2x^2-9x-5?
    14·1 answer
  • Hey can you please help me posted picture of question
    13·1 answer
  • A theater sold a total of 570 tickets for a new movie. Of those tickets, 30% were children's tickets. How many children's ticket
    13·2 answers
  • What are the factors of the following quadratic equation 12=x^2-x
    13·1 answer
  • How much does 5 pounds for $2.49 equal
    10·1 answer
  • A small cube with side length 6y is placed inside a larger cube with side length 4x^2. What is the difference in the volume of t
    14·2 answers
  • What are the answers to these??
    8·1 answer
  • Y = 2000-(1.05)
    7·1 answer
  • WHAT IS THE SOLUTION?
    9·1 answer
  • Determine the equation of the following polyromial that passes through point (0,6).
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!