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
andriy [413]
3 years ago
12

as a fundraiser, the music club sold shirts. They sold a total of 40 shirts. children's shirts cost $13 and adult shirts cost $1

7. If they collected a total of $588 from the sale of the shirts, how many adult shirts were sold?
Mathematics
1 answer:
GalinKa [24]3 years ago
4 0

Answer:

17 adult shirts were sold

Step-by-step explanation:

x = adult shirts and y = children shirts

x + y = 40......adult shirts + child shirts = 40 total shirts

17x + 13y = 588...$ 17 for each adult shirt (x) + $ 13 for each child shirt (y) = $ 588

these are the equations we will be using.

now lets rearrange the first one....x + y = 40......x = 40 - y.....now sub 40 - y in for x back into the second equation

17x + 13y = 588

17(40 - y) + 13y = 588

680 - 17y + 13y = 588

-17y + 13y = 588 - 680

-4y = - 92

y = -92/-4

y = 23 <=== so there were 23 child shirts sold

x + y = 40

x + 23 = 40

x = 40 - 23

x = 17 <===== and 17 adult shirts sold

check...

17x + 13y = 588

17(17) + 13(23) = 588

289 + 299 = 588

588 = 588 (correct)

You might be interested in
Simplify 4 + 2 (3x - 7) + 5x.<br> -3x + 4<br> 11x - 3<br> 11x - 10<br> 23x - 7
N76 [4]
4 + 2(3x - 7) + 5x
Distribute
4 + 6x -14 + 5x
Combine like terms
-10 +11x or 11x - 10

Third option
7 0
3 years ago
15 / √31 - 4
NeX [460]

Answer:

\frac{15}{ \sqrt{31} - 4}} = \sqrt{31} + 4

Step-by-step explanation:

\frac{15}{\sqrt{31} - 4}\\\\=\frac{15}{\sqrt{31} - 4} \times \frac{\sqrt{31} + 4}{\sqrt{31}+ 4} \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \   [  \ rationalizing \ the \ denominator \ ]\\\\=\frac{15( \sqrt{31} + 4 )}{(\sqrt{31})^2 - (4)^2}  \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \  \ \ \ [ \ (a-b)(a+b) = a^2 - b^2 \ ]\\\\=\frac{15 ( \sqrt{31} + 4)}{31 - 16}\\\\=\frac{15 (\sqrt{31} + 4)}{15}\\\\= \sqrt{31} + 4

6 0
2 years ago
a researcher is interested in whether or not a significant trend exists regarding the popularity of certain music played at rest
IrinaK [193]

No the results did not deviate significantly from what would be expected due to chance.

<h3>What is standard deviation?</h3>

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a larger range, a low standard deviation suggests that the values tend to be near to the established mean. The term "standard deviation" (or "") refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed.

To know more about standard deviation,

brainly.com/question/14747159

#SPJ4

6 0
1 year ago
Earth, Mars, Saturn, Uranus and Neptune revolve around the sun. Earth takes 1 year, Mars 2 years, Saturn 30 years, Uranus 84 yea
Anettt [7]

Answer:

  30 years

Step-by-step explanation:

2 is a factor of 30, so the LCM of 2 and 30 is 30.

Saturn and Mars will appear in the same direction in the night sky every 30 years.

3 0
3 years ago
48 books on 6 shelves. How many books on 12 shelves?
vitfil [10]
96 books because if you multiply by 2 that’s double of what the first answer was
5 0
3 years ago
Read 2 more answers
Other questions:
  • ohn is driving around town. When he reaches the gas station, he notes that he has traveled 20 miles. He reaches home 2 hours lat
    9·1 answer
  • Which scenario can be represented using the inequalities below? 1.25 &lt; x &lt; 1.5 a container of milk costs at least $1.25 bu
    6·2 answers
  • A penny and a nickel are tossed. Describe the sample space of the experiment.
    11·1 answer
  • A triangle has an area of 32 square millimeters and a base of 8 millimeters.<br> What is its height?
    12·1 answer
  • How are angle 6, 4, and 6, 2 related?
    11·1 answer
  • PLEASE RESPOND!!!!
    8·1 answer
  • Under his cell phone plan, Parker pays a flat cost of $36.50 per month and $5 per gigabyte. He wants to keep his bill under $45
    11·1 answer
  • What type of polygon is shown?​
    8·2 answers
  • Find the slope of the following graph.
    6·2 answers
  • A. 30.3 units2<br> B. 21.61 units2<br> O C. 14.65 units2<br> D. 13.1 units2
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!