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
Suppose the scores on a test given to all juniors in a school district are normally distributed with a mean of 74 and a standard
ivann1987 [24]

Answer:

\mu -\sigma = 66 , \mu +\sigma = 82

\mu -2\sigma = 58 , \mu +2\sigma = 90

\mu -3\sigma = 50 , \mu +3\sigma = 98

And in the figure attached we see the limits with the percentages associated.

Step-by-step explanation:

For this case we know that the random variable of interest is the scores on a test given to all juniors in a school district follows a normal distribution with the following parameters:

X \sim N(\mu= 74, \sigma =8)

For this case we know from the empirical rule that within one deviation from the mean we have approximately 68.2% of the data, within 2 deviations from the mean we have 95% and within 3 deviation 99.7%

We can find the limits and we got:

\mu -\sigma = 66 , \mu +\sigma = 82

\mu -2\sigma = 58 , \mu +2\sigma = 90

\mu -3\sigma = 50 , \mu +3\sigma = 98

And in the figure attached we see the limits with the percentages associated.

7 0
4 years ago
Find the eighth term of an arithmetic sequence whose fourth term is 19 and whose fifteenth is 52.
Elina [12.6K]

Answer:

its C can u give me brainly

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
1.6 x 3.7 SOMEONE PLEASE SOLVE THIS DOING THIS “ first multiply all the numbers as if they were whole numbers, when you have you
Tju [1.3M]

Answer:

5.92

Step-by-step explanation:

16*37=

592

put the decimals in next

4 0
3 years ago
67.498 to the nearest whole number
insens350 [35]

Answer:

67

Step-by-step explanation:

To round 67.498 to the nearest whole number consider the tenths’ value of 67.498, which is 4 and less than 5. Therefore, we have to round down: the whole number ones place value of 67.498, 67, remains 67, and the decimal point and all digits (.498) are removed.

67.498 rounded to the nearest whole number = 67

8 0
3 years ago
Derek has $20 to spend on used
goldfiish [28.3K]
5x+2y = 20

For every hardcover book (x) you will be charged 5$.

For every paperback book (y) you will be charged 2$.

The amount of both types of books you buy has to be under or equal to 20$
5 0
4 years ago
Read 2 more answers
Other questions:
  • Evaluate 4t^2 divided by t for t=10
    15·2 answers
  • What is the value of 20/6 = p/2
    10·2 answers
  • Which steps should be used to compare the fractions StartFraction 2 Over 9 EndFraction and StartFraction 5 Over 6 EndFraction? F
    14·2 answers
  • To make lemonade , Kate uses 1 cup of lemon juice and 2 cups of sugar. If she makes a larger amount of lemonade with 10 cups of
    12·1 answer
  • I will give you brainliest!!!!! Use the substitution method to solve for the system of equations. x+2y=6 y=x-3
    10·2 answers
  • mary anne sold 20 necklaces and bracelets at the craft fair. she sold 3 times as many necklaces ad bracelets. how many bracelets
    9·1 answer
  • Find the value of x <br> A. X=16<br> B. X=7<br> C. X=56<br> D. X=4
    12·1 answer
  • Help me pls im failin
    13·1 answer
  • \begin{aligned} 4{,}570=&amp; 4 \text{ thousands} + 5 \text{ hundreds} + 7 \text{ tens} \\\\ 4{,}570=&amp; 3 \text{ thousands} +
    13·1 answer
  • what's 77787464564576876979875648366732783656938629312935o5193865435986581653195395619856589316589346531713683586982635 x 473853
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!