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Natali [406]
3 years ago
12

a 15% tip to represents the ratio $0.15 to 100 cents. why does this make 15 percent a unitless Factor

Mathematics
1 answer:
DochEvi [55]3 years ago
8 0
We don't assume that 15% is 15% of some number of cents - it's just 15/100.  In the given example, we have 15 cents divided by 100 cents.  We can remove the cents from both the numerator and the denominator to get 15/100, which has no units.
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Ruth has 7 more brown pencils than blue pencils, and 11 more blue pencils than red pencils. She has 5 red pencils. How many brow
olya-2409 [2.1K]

Answer: There are 5 red pencils, 16 blue pencils and 23 brown pencils.

Step-by-step explanation:

Since we have given that

Number of red pencils = 5

Number of blue pencils are 11 more than red pencils.

So, Number of blue pencils would be

11+5=16

Number of brown pencils are 7 more than blue pencils.

So, number of brown pencils would be

16+7=23

Hence, there are 5 red pencils, 16 blue pencils and 23 brown pencils.

8 0
3 years ago
The function g(n) = n2 − 16n + 69 represents a parabola.
miss Akunina [59]
Hello : 
<span>g(n) = n2 − 16n + 69
       =( n²-16n+64)-64 +69.....(</span><span> completing the square)
</span>g(n) = (n-8)² +5...... (<span>the vertex form)
the vertex is : (8,5)
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5 0
3 years ago
a train travels 16 miles in 20 minutes . at this rate how many minutes will it take to tavel 12 miles
asambeis [7]

Answer:

15 minutes

Step-by-step explanation:

distance = rate · time

16 = 20r

r = 16/20 or 4/5 miles per minute

12 = 4/5·t

4t = 12·5

t = 60/4 or 15 minutes

7 0
2 years ago
Read 2 more answers
Let w=width and 4 + w=
kozerog [31]

Answer:

Part 1 : w^2+4w-60=0

Part 2 :

w=6

l = 10

Step-by-step explanation:

Part 1:

Let the width of the rectangle = w

Length of the rectangle = w + 4

Area of the rectangle is given as

60 Sq Yrds

60=w(w+4)

60=w^2+4w

w^2+4w-60=0

Hence this expression represents the area of the rectangle. Solving which for w will give us the width of the rectangle.

Part 2:

(w+10)(w-6)= 0

either (w+10) = 0

or

(w-6)=0

or both are zero

(w+10) = 0 ⇒ w = -10

not possible as the dimension can not be 0

(w-6)=0  ⇒ w=6

Hence the width is 6 yards

And thus the length will be 6+4 = 10 yards

8 0
3 years ago
What two numbers multiply to make 12 but<br> add to make -7?
vichka [17]

Answer:

negative three and negative 4 :)

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
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