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Brilliant_brown [7]
3 years ago
14

The librarian needs to return 24 books to the shelf. In one hour she finished 3/4 of the job. How many books has she

Mathematics
2 answers:
Rudiy273 years ago
3 0

Answer:

18 books done and 6 books left

Step-by-step explanation:

24 *3/4 = 18

kobusy [5.1K]3 years ago
3 0

Answer:

18 books done and 6 books left

Step-by-step explanation:

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What is the factored form of the expression?<br><br> d^2 = 36d + 324
Veseljchak [2.6K]

Answer:

(x-43.45)(x+7.45)=0

Step-by-step explanation:

We have the quadratic equation d^{2}=36d+324  i.e. d^{2}-36d-324=0

As, the roots of the quadratic equation ax^{2}+bx+c=0 are given by x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}.

So, from the given equation, we have,

a = 1, b = -36 , c = -324.

Substituting the values in x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}, we get,

x=\frac{36\pm \sqrt{(-36)^{2}-4\times 1\times (-324)}}{2\times 1}

i.e. x=\frac{36\pm \sqrt{1296+1296}}{2}

i.e. x=\frac{36\pm \sqrt{2592}}{2}

i.e. x=\frac{36\pm 50.9}{2}

i.e. x=\frac{36+50.9}{2}  and x=\frac{36-50.9}{2}

i.e. x=\frac{86.9}{2}  and x=\frac{-14.9}{2}

i.e. x = 43.45 and x = -7.45

Thus, the roots of the equation are 43.45 and -7.45.

Hence, the factored form of the given expression will be (x-43.45)(x+7.45)=0

3 0
3 years ago
What is the solution to 15 = d - 1 ?
Fofino [41]

Answer:

d = 16

Step-by-step explanation:

15 = d-1

Add 1 to each side

15 +1 =d-1+1

16 =d

8 0
3 years ago
Paola burns 30 calories walking 10 minutes. At this rate, how many calories will she burn in
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Answer:

45

Step-by-step explanation:

Divide 30 by 10. You get 3. Take three and multiply it by 15. Your answer is 45.

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Answer:

gmkyhmfnggnjggfbvmhfjxxjyyjyjhchhfxg

Step-by-step explanation:

8 0
3 years ago
Jayden has been reading 275-page book for English class. On average, he has read about 10 pages in 15 minutes (min). With a dead
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The answer is 100 % D
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