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]
3 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]3 years ago
3 0
She can expect 522 people to take the advanced course.
You might be interested in
Solve the inequality: 3p - 16 < 20
Alekssandra [29.7K]

Isolate the p. First, add 16 to both sides

3p - 16 (+16) < 20 (+16)

3p < 36

Next, isolate the p. Divide 3 from both sides

3p/3 <36/3

p < 12

p < 12 is your answer

hope this helps

4 0
3 years ago
Find the vertex and y intercept of the quadratic function​
riadik2000 [5.3K]

Answer:  5) Vertex = (2, 28)   y-intercept = 40  → (0, 40)

               6) Vertex = (2, 11)     y-intercept = 7    → (0, 7)

<u>Step-by-step explanation:</u>

The y-intercept of the equation is when x = 0. It is the c-value when given in standard form: y = ax² + bx + c

To find the vertex, use the Axis of Symmetry equation to find the x-value

x = -b/(2a). Then plug the x-value into the equation to find the y-value.

5) y = 3x² - 12x + 40

         ↓       ↓       ↓

     a=3    b= -12  c=40

\text{AOS:}\quad x=\dfrac{-b}{2a}\quad =\dfrac{-(-12)}{2(3)}\quad =\dfrac{12}{6}\quad =2

Min:  y = 3(2)² - 12(2) + 40

           = 3(4)  - 24 + 40

           = 12 - 24 + 40

           = 28

Vertex: (2, 28)    y-intercept = 40

*******************************************************************************************

6) y = -x² + 4x + 7

         ↓      ↓      ↓

    a= -1    b=4  c=7

\text{AOS:}\quad x=\dfrac{-b}{2a}\quad =\dfrac{-(4)}{2(-1)}\quad =\dfrac{-4}{-2}\quad =2

Max:  y = -(2)² + 4(2) + 7

           = -(4)  + 8 + 7

           = -4 + 8 + 7

           = 11

Vertex: (2, 11)    y-intercept = 7

5 0
3 years ago
Let f(x) = 3 x + 1 What is the value of x when f(x) = 7 ​
NemiM [27]

Answer:

2

Step-by-step explanation:

3*2+1 = 7

6 0
3 years ago
Read 2 more answers
Can someone help with this question, answer asap. I’ll give brainliest to the first best answer. Thanks.
postnew [5]

Answer:

2/3 on technique

1/9 on fitness exercise

2/9 on strength exercise


Step-by-step explanation:

He spends 2/ (2 + 1) = 2/3 of his time on technique

That leaves him with 1/3 of his time exercising

Time spent on fitness = 1 (1+2)  * 1/3

= 1/3 * 1/3 = 1/9 of his time

Time spent on strength exercise = 2/3 * 1/3  = 2/9

8 0
3 years ago
step by step on how to solve this equation by firstly collecting like terms; 7-5y = 3y-17
gtnhenbr [62]
Hello!

You can solve this algebraically

7 - 5y = 3y - 17

Add 5y to both sides

7 = 8y - 17

Add 17 to both sides

24 = 8y

Divide both sides by 8

3 = y

The answer is 3

Hope this helps!
4 0
4 years ago
Read 2 more answers
Other questions:
  • Jordan is using a number line to model the division expression Negative 24 divided by 12. What should be a step in his work?A.Dr
    7·2 answers
  • Select the exclusion that fits best with this problem.<br><br><br><br> 13x^6/51x^4
    13·1 answer
  • college algebra - please help The half-life for thorium-227 is 18.72 days. The amount A (in grams) of thorium-227 after t days f
    14·1 answer
  • Why is the measure of angle a in the triangle enter your answer in the box
    9·1 answer
  • BRAINLIESTT ASAP! PLEASE HELP ME :)
    6·1 answer
  • Find three solutions of the equation.
    12·2 answers
  • What is slope of this
    11·2 answers
  • Point b is one the graph of the function f(x)=-3^2 if the x cordinate of point v is 2 which ordered pair gives the location of p
    5·2 answers
  • Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 5.9 parts
    7·1 answer
  • What does the point (1,8) represent in the context of this graph?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!