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slamgirl [31]
3 years ago
5

Ruby is decorating for a party and needs 120 meters of ribbon. At the party supply store, the ribbon is sold in rolls. Each roll

contains 25 feet of ribbon. How many rolls will Ruby need to purchase? (1 meter is approximately 39.37 inches)
Mathematics
1 answer:
Rufina [12.5K]3 years ago
6 0

Answer:

She will need to purchase 16 rolls of ribbon

Step-by-step explanation:

Step 1: Express the total length of ribbon

Use the expression below;

T=R×N

where;

T=total length of ribbon Ruby has

R=length per roll

N=number of rolls

In our case;

T=120 meters, but since 1 meter=3.28084 feet

T=(120×3.28084)=393.7008 feet

R=25 feet

N=n

replacing;

393.7008 =25×n

n=393.7008/25

n=15.748 rounded up=16

She will need to purchase 16 rolls of ribbon

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In a class of 40 students, everyone has either a pierced nose or a pierced ear. The professor asks everyone with a pierced nose
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Answer:3

Step-by-step explanation:

Given

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n\left ( N\cup E\right )=n\left ( E\right )+n\left ( N\right )-n\left ( N\cap E\right )

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<h3>Answer: Choice D</h3>

Domain: {-3, -1, 2, 4, 6}  

Range: {-2, 1, 2, 4, 6}

===========================================

Explanation:

The domain is the set of possible x values of a relation or function. To form the domain, we just list out the x coordinates of each point

Point A is located at (-3, 4) so the x coordinate x = -3 is part of the domain

Point B is at (-1,1) meaning x = -1 is also part of the domain

And so on. Doing this for all five points leads to the list of x coordinates {-3,-1,2,4,6} which is the domain.

--------------------

The range is a similar story, but we look at the y coordinates now. Point A has y coordinate 4, so y = 4 is part of the range.

Point B has y coordinate y = 1, so that is also part of the range.

The range is {-2, 1, 2, 4, 6} representing all of the possible y values of this relation.

With any set, the order does not matter. Though convention is to list the items from smallest to largest.

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