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Alla [95]
3 years ago
8

Jason went to his local zoo where 20% of it's exhibits featured canines. If the zoo features 25 exhibits in total, then how many

of the zoo's exhibits feature canines? Round your answer to the nearest whole number if necessary. _____________
Mathematics
1 answer:
Ratling [72]3 years ago
7 0

Answer:

\frac{25}{100}=\frac{x}{20}

And if we solve for the value of x we got:

x = 20* \frac{25}{100}=5

So then we can conclude that the number of canines is 5 for this case

Step-by-step explanation:

For this case we know that the total number of canines is 25 and 20% represent the canines so we can apply the following proportional rule:

\frac{25}{100}=\frac{x}{20}

And if we solve for the value of x we got:

x = 20* \frac{25}{100}=5

So then we can conclude that the number of canines is 5 for this case

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An office supply store recently sold a black printer ink cartridge for $17.99 and a color printer ink cartridge for $20.99. At t
UNO [17]

Answer:

40 black ink cartridges and 19 colored ink cartridges

Step-by-step explanation:

Let b represent the number of black printer ink cartridges sold. Let c represent the number of color printer ink cartridges sold.

Set up a system of equations:

\displaystyle\\\begin{cases}b+c=59\\17.99b+20.99c=1,118.41\end{cases}

b+c=59\implies b=59-c

Substitute:

\displaystyle\\17.99(59-c)+20.99c=1,118.41\\\implies c=\boxed{19}

\implies b+19=59\implies b=\boxed{40}

⇒ 40 black ink cartridges, 19 colored ink cartridges (ans)

8 0
2 years ago
Which of the following angle measurements would you find in an equilateral triangle?
lesya692 [45]

Answer:

D. 60, 60, 60

Step-by-step explanation:

In an equilateral triangle, all sides are equal and equal to 180 when added together. because 60×3 is equal to 180, D is the right answer. I hope this helps you!

3 0
2 years ago
Sorry I need help with these 3! Thank you to whoever takes the time to solve them!!!
mash [69]
1.)
Starts with 40:10, then cuz you have 80 buns, you need to x2, so it would be 20 cubes

2.)
I don’t know, sorry

3.)
4:2 and 60 in total
so 4+2 is 6 and 60/6 is 10
so it would be 40:20 so 20

hope this helps :)
8 0
3 years ago
If vx = 7.60 units and vy = -6.60 units, determine the magnitude of v⃗ .
Liula [17]
To find the magnitude of a vector, take the components, square them, then add them, then take the square root. This is very similar to the Pythagorean Theorem.

For your particular problem, I’ve included a picture showing how that specific calculation is done. :)

4 0
3 years ago
Read 2 more answers
If f(n) = n2 - n, then f(-4) is _____.<br> -20<br> 20<br> 12<br> -12
kolbaska11 [484]
<span>The correct option is "20" because

f(n)=<span>n2</span>−n
(−4)=(−4<span>)2</span>−(−4)
      =16+4
      =20</span>
8 0
3 years ago
Read 2 more answers
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