Hannah read 5 books in 15 months.What was her rate of reading I’m books per month ?

Mathematics

2 answers:

Lady_Fox [76]3 years ago

6 0

1 book every 3 months

Reika [66]3 years ago

4 0

Answer:

1 book every 3 months

Step-by-step explanation:

if ..............5 books = 15 months what about 1 book
you divide 15 by 5 to get 3 so as to get the rate of books he read per month
hope you'll understand

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please help me it is URGENT pls the first one is solve and the 2nd one is simplify I will give u lots of points thank you

klasskru [66]

I.) (5x+3)/4-(2x-4)/3=5
Clear fractions:
3·((5x+3)/4)=15x+9
4·((2x-4)/3)=8x-16
15x+9-(8x-16)=5
15x+9-8x+16=5
Combine like terms:
7x+25=5
7x=-20
x=-20/7

II.) (3/11)·(5/6)-(9/12)·(4/3)+(5/13)·(6/15)
Remember PEMDAS
So first multiply:
3/11·5/6=15/66
9/12·4/3=3/3·1/1=3/3=1
5/13·6/15=1/13·6/3=6/39=2/13
(15/66)-1+(2/13)
Combine:
15/66-1/1=15/66-66/66=-51/66
-51/66+2/3=-51/66+44/66=-7/66
Answer: -7/66 :)

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4 years ago

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Use mental math and a pattern to find the product of 70*300

Dmitrij [34]

70*300

=70(100+100+100)

=7,000+7,000+7,000

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3 years ago

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A camera shop stocks eight different types of batteries, one of which is type A76. Assume there are at least 31 batteries of eac

Sauron [17]

Answer: 12,620,256

Step-by-step explanation:

Given: The camera shop socks eight different types of batteries and there re at least 31 batteries of each type.

Here we want to select r= 31 batteries from n= 8 kinds of batteries, then formula we use to find number of ways is $^{n+r-1}C_r=\ ^{31+8-1}C_{31}$

$=^{38}C_{31}=\dfrac{38!}{31!(38-31)!}\\\\=\dfrac{38!}{31!7!}\\\\=\dfrac{38\times37\times36\times35\times34\times33\times32\times31!}{31!\times5040}\\\\=12620256$