First, convert all fractions to the lowest common denominator: 20
It takes 5/20 of an hour to string bracelets and 2/20 of an hour to string them. Thus, it takes 7/20 of an hour to make one bracelet.
Megan has 5 and 4/20 hours, or 104/20 hours, to make bracelets. Here, we must divide 104/20 hours by 7/20 hours.
Really, it is dividing 104 by 7 since they have the same denominator. 104/7 is 14.86, so she can make 14 whole bracelets in 5 and 1/4 hours.
<span>x+y=5
x-y=1
-------------add
2x = 6
x = 3
</span>x+y=5
3+y=5
y = 2
solution
(3,2)
answer is <span>c. (3, 2)</span>
Answer:
7,982 ft
Step-by-step explanation:
c = πd
25077 = πd
Divide both sides by π
25077/π = d
d = 7,982 ft
----------------------
I think the 25077 number in the question might be a typo
Just divide the correct number by 3.14 to get the diameter.
Answer:
The mass of 150 books = 41.7kg
The number of books that have mass 20kg = 72 books
Step-by-step explanation:
(I) Number of identical books = 108
Mass of books = 30 kg
Mass of 150 books = ?
Let the mass of 150 books = x kg
To find the mass of 150 books we will use ratio and proportion:
108 books: 30kg = 150 books: x kg
You can also write it like this because ratio can be written in division:
108/30 = 150/x
By cross multiplication:
108x = 150*30
108 x= 4500
Divide both sides by 108
108 x/108 = 4500/108
x= 41.7
Thus the mass of 150 books = 41.7kg
( ii ) The number of books that have a mass of 20 kg = ?
Let assume that the number of books of mass 20 kg = y books
We will again use ratio and proportion method.
108 books: 30kg = y: 20kg
We can write it as:
108/30 = y/20
By cross multiplication:
108 *20 = 30y
2160= 30y
Divide both the terms by 30
2160/30 = 30y/30
72 = y
Therefore the number of books that have mass 20kg = 72 books ....