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
vichka [17]
3 years ago
10

The area of a rectangular swimming pool is 360 square feet. If the length of the swimming pool is 9 feet more than its width, fi

nd the length of the pool
Mathematics
1 answer:
Inessa [10]3 years ago
7 0

Answer:

l = 24ft

Step-by-step explanation:

A = lw

360 = (x + 9)(x)

360 = x^2 + 9x

0 = x^2 + 9x - 360

0 = (x + 24)(x - 15)

x ≠ -24 (length cannot be negative)

x = 15

l = 15 + 9

l = 24ft

You might be interested in
Find the inequality represented by the graph.
anzhelika [568]

Answer:

Step-by-step explanation:

y intercept is 3

y - 4 = 3 ( x - 4)

y - 4 = 3x - 12

y < 3x - 8

not equal to because the line is dashed.

not greater than because the shading is below the line

7 0
3 years ago
In a woodworking class, you need to make five triangles out of plywood. Each triangle has a height of 6 inches and a base of 14
Bogdan [553]

Answer:5 * (1/2 * 6 * 14)= x

Step-by-step explanation: :D

3 0
3 years ago
Weight of a rock: In a geology course, students are learning to use a balance scale to accurately weigh rocks. One student plans
statuscvo [17]

Answer:

The student who weighted the rock 5 times has a 95% confidence interval of (25.2, 29.1) which is guaranteed to be more wider (less precise) than the other student who weighted the rock 20 times.

Step-by-step explanation:

What is Confidence Interval?

The confidence interval represents an interval that we can guarantee that the target variable will be within this interval for a given confidence level.  

The confidence interval is given by

CI = \bar{x} + t_{\alpha/2}(\frac{\sigma}{\sqrt{n} } ) \\

Where \bar{x} is the mean weight \sigma is the standard deviation t_{\alpha/2} is the critical value from t-table and n is the sample size.

The term t_{\alpha/2}(\frac{\sigma}{\sqrt{n} } ) is known as margin of error.

As the sample size is decreased the corresponding margin of error increases which results in wider confidence interval which means smaller precision.

The student who weighted the rock 5 times has a 95% confidence interval of (25.2, 29.1) which is guaranteed to be more wider (less precise) than the other student who weighted the rock 20 times.

We can say with 95% confidence that the true mean weight of the rock is within the interval of (25.2, 29.1).

7 0
3 years ago
Express 5.412 hours to the nearest minute
Agata [3.3K]

Answer:323.72

Step-by-step explanation:

Begin by multiplying 60 by 5 hours.

Then 60 minutes by 0.412

8 0
3 years ago
Read 2 more answers
I need help!!<br> I don’t get it!!
Len [333]

Answer:

170

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • How do you do this question?
    8·1 answer
  • If the range of f (x) = StartRoot m x EndRoot and the range of g (x) = m StartRoot x EndRoot are the same, which statement is tr
    5·2 answers
  • Where do I find math class? . . . there are 10 doors only 2 that could be it.<br>SIMPLE MATH x'D
    8·1 answer
  • A skydiver is falling out about 176 ft./s. How many feet per minute is he falling??
    10·1 answer
  • The vertices of polygon ABCD are at A(1, 1), B(2, 3), C(3, 2), and D(2, 1). ABCD is reflected across the x-axis and translated 2
    10·2 answers
  • Duane and mick are saving their money to build a new tree house.Duane adds 5 dollars.Mick adds 2 dollars every week.So far they
    15·1 answer
  • Jose wants to fence in his garden. The shape is a rectangle. Two sides are each 12 feet long. The other two sides are each 108 i
    9·1 answer
  • Someone please help me :( I have no idea what I’m doing here
    12·1 answer
  • A rectangular prism has a base with a length of 25, a width of 9, and a height of 12. A second prism has a square base with a si
    5·1 answer
  • ZA and B are supplementary and vertical angles. What is m&lt;B
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!