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
Liono4ka [1.6K]
2 years ago
15

RECREATION An instructor at a swimming pool asked her students if they would be interested in a n advanced swimming course, and

60% stated that they would. Is the sample method valid? If so, suppose there are 870 pool members. How many peoplecan theinstructorexpecttotakethecourse?
Mathematics
1 answer:
vfiekz [6]2 years ago
3 0
She can expect 522 people to take the advanced course.
You might be interested in
X+3y-2z=10, -x-2y+z=-7, 3x+9y-5z=28
NISA [10]
Hmm
what you do is try to eliminate 1 variable in 2 equaions first
we can elminate x's in first and 2nd equation

add first and 2nd equation
x+3y-2z=10
<u>-x-2y+z=-7 +</u>
0x+y-z=3
y-z=3


multiply 2nd equation by 3 and add to last one
-3x-6y+3z=-21
<u>3x+9y-5z=28 +</u>
0x+3y-2z=7

3y-2z=7

we now have
y-z=3
3y-2z=7
multiply first equation by -2 and add to 2nd

-2y+2z=-6
<u>3y-2z=7 +</u>
y+0z=1
y=1

now we can sub back
y-z=3
1-z=3
minus 1
-z=2
times -1
z=-2

sub baack into any equation
x+3(1)-2(-2)=10
x+3+4=10
x+7=10
minus 7
x=3

x=3
y=1
z=-2
(3,1,-2)

6 0
3 years ago
Read 2 more answers
Graph the image of the polygon after a reflection in the line y=x<br><br> PLEASE HELP
bazaltina [42]

Answer:

a6,-3

b1,-2

c4,1

Step-by-step explanation:

8 0
3 years ago
HARD QUESTION. THINK SMARTER Can you please help me with this question. pleaseeeeeee
Mumz [18]
The length of his territory is 12 square miles long, just divide 96 and 8, in which you get 12
7 0
3 years ago
Read 2 more answers
A plane flies 1400 kilometres in 2 hours 30 minutes
Sloan [31]
560 kilometers flied in each hour
8 0
3 years ago
Badel has 120 cm³ of water he wants to pour into a rectangular base that is 4 cm high 40 mm wide and 5 cm long will all the wate
Elenna [48]
Yes all the water will fit and more because to find a volume of an object you multiple the height x length x width and in this case when all of it is calculated the base could hold 800 cm3 of water
4 0
3 years ago
Other questions:
  • Can anyone else not see the answers to questions or is it just me? If so, how do I fix it?
    14·2 answers
  • PLEASE HELP ASAP!!!!!
    7·1 answer
  • Solve for x: −1 &lt; x + 3 &lt; 5<br><br> Answer ASAP please!
    12·1 answer
  • What is 3 2/6- 2/3 <br> And how do you figure it out??
    8·2 answers
  • Someone please help with all this. Show working out as well! Will mark as brainliest.<br> Thanks
    12·1 answer
  • Which value of x makes the equation 2 + 8 = 15<br> true?
    14·2 answers
  • Points (3, 2) and (7, 2) are on the graphs of both quadratic functions f and g. The graph of f opens downward, and the graph of
    9·1 answer
  • Simplify completely ASAPP
    15·1 answer
  • The farmer brought 180 cabbage to the market.
    5·1 answer
  • Can anybody do this please hurry
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!