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
timofeeve [1]
3 years ago
15

Kara has 21 collectible buttons to sell. She sells the small buttons for $3 and the large buttons for $4, and earns a total of $

68. If the small buttons are represented by x and the large buttons are represented by y which of the following systems of equations can be used to calculate the number of large and small buttons sold.Answersx+y=21,3x+4y=68x+y=68, 3x+4y=21x+y=21, 4x+3y=68x+y=68, 4x+3y=21
Mathematics
1 answer:
Serga [27]3 years ago
5 0
We know that there are 21 buttons total. x is the number of small buttons and y is the number of large buttons. 

Therefore, our first equation should be x+y = 21.

We know the small buttons sell for 3 dollars, meaning 3x represents how much is made from the small buttons. The larger buttons sell for 4 dollars, meaning 4y is how much is made from the large buttons. 

We also know that the total of the buttons sold is 68 dollars. Therefore 3x + 4y = 68 is our second equation.

From this information, the answer is the first set.

You might be interested in
Urgent!!!) pls help me out how to solve question a? using the above data given for functions ..
pentagon [3]

Answer:

graph it

Step-by-step explanation:

5 0
3 years ago
Sam took 4 courses last semester: Calculus, Biology, History, and Physics. The means and standard deviations for the final exams
frutty [35]

Answer:

Calculus

Step-by-step explanation:

Calculus: z = (94-70)/12 = 2

Bio: z = (74.5-77)/10 = -0.25

History: z = (45-53)/16 = -0.5

Physics: (70.5-60)/14 = 0.75

8 0
3 years ago
Read 2 more answers
You are dealt one card from a standard 52-card deck. Find the probability of being dealt an ace or a 6.
Ainat [17]

Answer:

2/13

Step-by-step explanation:

Since there's 4 of each card in the deck this means that there're 4 sixes and 4 aces, so 8 cards in a 52 card deck gives the problem 8/52 which equals 2/13

4 0
3 years ago
state the domain, the range, and the intervals on which function is increasing, decreasing, or constant in interval notation
erma4kov [3.2K]

Answer:

  • domain (-∞, ∞)
  • range (-∞, 4]
  • increasing (-∞, 0)
  • decreasing (0, ∞)
  • constant (only at x=0, not on any interval)

Step-by-step explanation:

The graph is of the equation y = -x^2 +4. It is a polynomial of even degree, so has a domain of all real numbers: (-∞, ∞).

The vertical extent of the graph includes y=4 and all numbers less than that:

  range: (-∞, 4]

The graph is increasing to the left of its vertex at x=0, decreasing to the right.

  increasing (-∞, 0); decreasing (0, ∞)

There is no interval on which the function is constant. It has a horizontal tangent at x=0, but a single point does not constitute an interval.

8 0
3 years ago
Given a cylinder with a radius of 5cm and a height of 8 cm, find the volume of the cylinder. Use 3.14 for T.
Radda [10]

Answer: V=628cm³

Step-by-step explanation:

V=(3.14)r²h

V=(3.14)(5²)(8)

V=628cm²

Hope this helps! Have a great night!

6 0
2 years ago
Other questions:
  • As part of a screening process, computer chips must be operated in an oven at 145 °C.
    7·1 answer
  • Sophie and Simon are peeling a pile of potatoes for lunch in the cafeteria. Sophie can peel all the potatoes by herself in 45 mi
    9·2 answers
  • A spherical scoop of ice cream is placed on a waffle cone. The
    11·1 answer
  • Bernice is participating in a walk for charity. she knows she can walk 3 miles in 45 minutes. at that rate, how long will it tak
    14·1 answer
  • Simplify 0.4(−4.5)......................................
    12·1 answer
  • Find the area and thhe circumference of a circle round your anser to the nearest hundredth if the diameter is 6
    14·1 answer
  • Given the regular polygon, what is the measure of each numbered angle?
    6·2 answers
  • Use the magnitudes​ (Richter scale) of the earthquakes listed in the data set below. Find the mean and median of this data set.
    5·1 answer
  • PLS HELP I NEED THIS ASAP PLS ANSWER CORRECTLY!!!!! THE QUESTION IS IN THE PICTURE BELOW!!!
    12·2 answers
  • in a triangle the 2nd angle measure twice the first and the third angle measures 4 more than the first if the sum of all angles
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!