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kvasek [131]
4 years ago
14

Devon has 80 books to pack in boxes she packs 20 books in each box how many boxes does she need? Write an equation using the let

ter n to stand for the unknown factor explain how to find the unknown factor
Mathematics
2 answers:
Tanzania [10]4 years ago
7 0
B = boxes
80 ÷ 20 = b
80 ÷ 20 = 4
To make it easy you can do 8 ÷2 = 4 which makes the same answer :)
She needs 4 boxes
seropon [69]4 years ago
7 0
Hello there,

Using variables we can use the equation 20*n=80, or 80÷n=20. Solving one of these equations, the answer is n=4. Hope this helps!

~Brainliest
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You want to buy a trampoline. You found one online that has a circumference of 6.28 yards. What is the area?
gizmo_the_mogwai [7]

The area of the trampoline  is mathematically given as

a = 3.14

<h3>What is the area?</h3>

Question Parameters:

You found one online that has a circumference of 6.28 yards

Generally, the equation for the Circumference   is mathematically given as

C = 2*pi*r

Thererfore

6.28 = 2*3.14*r

r = (6.28)/(6.28)

r = 1

In conclusion, where radius is

a= pi*r^2

a = 3.14*1^2

a = 3.14

Read more about  Arithmetic

brainly.com/question/22568180

7 0
3 years ago
Read 2 more answers
There are 84 new houses being built in a neighborhood. Last month, 1/3 of them were sold. This month, 5/7 of the remaining house
noname [10]
There are a total of 16 houses left
4 0
3 years ago
I need help please hurry.
Anarel [89]

Answer:the answer is the first

Step-by-step explanation:

Because the expression can be written as -10r2/2r2+4+5r/2r2+4+3/2r2+4

8 0
3 years ago
The price of a cycle is reduced by 25 per cent. The new price is reduced by a further 20 per cent.Find the single reduction the
Evgen [1.6K]

Answer:

40%  . The single reduction together is 40%.

Step-by-step explanation:

Let the bicycle cost is   x before reduced price.

First 25% is reduced  and again 20% further reduced.

Let the single reduction is y% if the two reduction together are equal.

Solution,

Case .1

reduction cost=x\times 25%%

=x\times 25/100

=x/4

The cost of bicycle after reduction of 25% is

=x-x/4=3x/4

cost of reduction further reduction of 20%      =3x/4\times 20%

=3x\times 20/(4\times 100)

=3x/20

The new cost of bicycle is further reduction of 20% is

=3x/4-3x/20

=\left ( 15x-3x \right )/20

=12x/20=3x/5

Case.2

if single reduction is done new cost of cycle is equal

x-x\times y%=3x/5

x\left ( 1-y/100 \right )=3x/5

\left ( 100-y \right )/100=3/5

100-y=60

y=40%

single reduction of a cycle is 40%

8 0
3 years ago
If x varies inversely with y and x = 4 when y = 8, find x when y = 16
Jobisdone [24]
I think x=8 
8/4 = 2
16/2 = 8
5 0
3 years ago
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