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Sliva [168]
4 years ago
10

There are 45 books on a bookshelf. if 9 are mystery books, what percent of the books on the bookshelf are mystery books?

Mathematics
1 answer:
Kay [80]4 years ago
4 0
20%, just calculate the fraction of mystery books and multiply that by 100 %
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The number of tropical fish that an aquarium can hold depends on the volume of the fish tank. the interior dimensions of the fis
Stells [14]
<span>To figure the amount of tropical fish in the aquarium you multiple length*height*width to find the cubic centimeters of the tank, then divide that number by 10,000. 60*50*30=90,000 cubic centimeters. 90,000/10,000=9. 9 tropical fish could be places in a tank with those dimensions.</span>
3 0
3 years ago
Read 2 more answers
2x^2-13x-24 factor the polynomial<br><br> Explain please
vovangra [49]

Answer:

(x - 8)(2x + 3)

Step-by-step explanation:

To factor a polynomial of the form

ax² + bx + c,

follow these steps:

1) Multiply ac together.

2) Find 2 factors of ac that add to b. Call these factors p and q.

3) Break up the middle term of the polynomial into px + qx.

4) Factor by grouping.

Now let's follow the steps above with your problem.

You are given the polynomial

2x² - 13x - 24,

so a = 2, b = -13, and c = -24

1) Find ac.ac is the product 2(-24) = -48

2) Now we need to find 2 factors of -48 that add to b, -13.

I know that 48 = 3 × 16, so if we use -16 and 3 for the two numbers, we have

-16 + 3 = -13

and -16 × 3 = -48.

3) Now we break up the middle term of the polynomial, -13x, into -16x + 3x.

The polynomial is now

2x² - 16x + 3x - 24

4) We factor the polynomial by grouping. To factor by grouping, you factor a common factor out of the first 2 terms and factor out a common factor out of the last two terms.

2x² - 16x + 3x - 24 =

= 2x(x - 8) + 3(x - 8)

We now see the common factor of x - 8, so we factor that out.

= (x - 8)(2x + 3)

Answer: (x - 8)(2x + 3)

8 0
3 years ago
Does anyone know this?
Marina CMI [18]
1.37x10^9 is the correct answer:)
3 0
3 years ago
Read 2 more answers
The temperature in Armand’s town in the morning was – 3.6°F. The temperature in the afternoon was 0°F. What was the overall chan
OLEGan [10]

The overall temperature would be 3.6°F as this is how much it was changed by

Answer=3.6°F

7 0
3 years ago
Read 2 more answers
The instructions for a cough syrup are to give 2 teaspoons (tsp) every 8 hours. the cough syrup is supplied in 150-ml bottles. h
lbvjy [14]
2*3 = 6 teaspoons per day per child
6*5 = 30 teaspoons 
30*3 = 90 teaspoons 
You need 90 teaspoons

1 teaspoon = 4.9289 mL
90*4.9289 = 443.6010 mL
443.6010 / 150 = 2.9573 bottles

You need at least 3 bottles

3 0
3 years ago
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