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UkoKoshka [18]
3 years ago
13

A librarian wants to know many of her card members would buy used DVDs from the library. The library has 1162 card members. The

librarian randomly selects 80 of those members and finds that 63 of them would buy used DVDs from the library. Based on this sample, about how many of the card members would buy used DVDs from the library?
Mathematics
1 answer:
guajiro [1.7K]3 years ago
6 0
The answer is around 914.

About 914 card members would buy used dvds from the library.
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The width of a rectangular field is 20 feet less than its length. The area of the field is 12,000 ft? What is the length of the
Scilla [17]

Answer:

The answer is 120 feet.

Step-by-step explanation:

The area of the field (A) is:

A = w · l       (w - width, l - length)

It is known:

A = 12,000 ft²

l = w - 20

So, let's replace this in the formula for the area of the field:

12,000 = w · (w - 20)

12,000 = w² - 20

⇒ w² - 20w - 12,000 = 0

This is quadratic equation. Based on the quadratic formula:

ax² + bx + c = 0      ⇒  

In the equation w² - 20w - 12,000 = 0, a = 1, b = -20, c = -12000

Thus:

So, width w can be either

or

Since, the width cannot be a negative number, the width of the field is 120 feet.

6 0
3 years ago
Read 2 more answers
Can you please help me
Luba_88 [7]

Answer: Was there supposed to be a picture here?

Step-by-step explanation: If there was supposed to it isn't here

6 0
3 years ago
Using long division to find the quotient and remainder 4x^4+2x^2-2 divided by x^2+2
emmasim [6.3K]
                             4x²    -6
         __________________
x²+2  l 4x^4         +2x²     -2
         l  4x^4        +8x²
           --------------------
                            -6x²     -2
                            -6x²     -12
                           ---------------
                                       10

so the answer is (4x^2-6) \frac{10}{x^2+2}
8 0
4 years ago
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6 0
3 years ago
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Billy has been to three more than four times as many baseball games as Brendan. Brendan has been to 11 baseball games. Complete
Masteriza [31]
3 + 4 * y, y = 11
= 47
8 0
3 years ago
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