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
shusha [124]
3 years ago
14

Devante has a lunch account in the school cafeteria. His starting balance at the beginning of the month in $35.50. The first wee

k, Devante bought 3 lunches and his account balance was $28.00. The second week, Devante bought 5 lunches and his account balance was $15.50.
In a model that relates the balance of his lunch account as a function of the number of lunches he buys, what does the rate of change represent?

A) the number of lunches he purchases
B) The starting balance of his lunch account
C) The amount of money in his lunch account
D) The amount of money he pays for each lunch
Mathematics
1 answer:
Alla [95]3 years ago
8 0

Answer:

C) The amount of money in his lunch account

Step-by-step explanation:

You might be interested in
What is true about the solution above.
Masja [62]

ANSWER

x =  \pm \sqrt{3}

and they are actual solutions.

EXPLANATION

The given equation is:

\frac{ {x}^{2} }{2x - 6}  =  \frac{9}{6x - 18}

Cross multiply

{x}^{2} (6x - 18) = 9(2x -6 )

This implies;

{x}^{2} (6x - 18) - 9(2x - 6) = 0

3{x}^{2} (2x - 6) - 9(2x - 6) = 0

Factor

(3 {x}^{2}  - 9)(2x - 6) = 0

3 {x}^{2}  - 9 = 0 \: or \: 2x - 6= 0

3 {x}^{2}   = 9 \: or \: 2x  = 6

{x}^{2}   = 3\: or \: x  = 3

{x}  =  \pm \sqrt{3} \: or \: x  = 3

The domain of the given equation is

x \ne3

Therefore the actual solutions are

x =  \pm \sqrt{3}

NB: x=3 is not in the domain of the given equation. It cannot be an extraneous solution.

7 0
3 years ago
How do you solve this as a solution 9(2 + 3x) < 72
laila [671]

Answer:

x <2

Step-by-step explanation:

9(2 + 3x) < 72

Divide each side by 9

9/9 *(2 + 3x) < 72/9

2+3x < 8

Subtract 2 from each side

2+3x-2 < 8-2

3x<6

Divide each side by 3

3x/3 <6/3

x <2

7 0
3 years ago
Review the graph.<br> Which function represents the graph?
Lilit [14]

Answer: C

Step-by-step explanation:

Since y = 0 at x=3pi/2, we know that this is a cosine graph.

So to determine if its -cos or cosine, we can test the pt (0, 1).

Since cos(0)=1 whereas -cos(0)=-1, the answer is y=cos(x).

6 0
2 years ago
Jessie had a piece of cardboard that is 8.5 inches by 11 inches. She makes a picture frame with the cardboard box by cutting out
velikii [3]
I could be very wrong, but I believe the answer is C
4 0
3 years ago
Read 2 more answers
To rent an instrument from the school it costs a $50 insurance fee and then $350 per day of use. If Sally rents her instrument f
Ne4ueva [31]

Answer:

$2,500

Step-by-step explanation:

$350 per day for 25 days

350*25=2450

Add the 50 for insurance and that makes it 2500

If its wrong im sorry

5 0
3 years ago
Read 2 more answers
Other questions:
  • 0.25x-8=16 what value of x makes the equation true?
    7·1 answer
  • Which of the following is the correct slope-intercept form of the equation -4x + 2y = 14? y = 4x + 14 y = -4x + 14 y = 2x + 7 y
    6·1 answer
  • X+49=75 <br>solve this equation by undoing
    9·2 answers
  • HElp?????????????????????????????????????????
    9·1 answer
  • For which equasion does the sum of the roots equal 3/4 and the product of the roots equal -2?
    12·1 answer
  • Find the value of x in the triangle shown below.
    11·2 answers
  • Give the most precise name for the quadrilateral. Then, find x and y.
    7·1 answer
  • Please Helpp Mee! I need it NOW!
    13·2 answers
  • What percentage of the large circle does the small circle take up?<br><br> Please please help
    10·1 answer
  • Boating: A paddleboat moves at a rate of 12 mph in still water. If the rover’s current moves at a rate of 3 mph, how long will i
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!