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FrozenT [24]
3 years ago
7

Someone pls help me with this questions

Mathematics
1 answer:
Veronika [31]3 years ago
7 0

Answer:

1) A giraffe's heart will beat 910 times in 14 minutes

Table for 1)

Beats      65     325    910

Minutes    1        5        14

2) $8.80 for 4 bags of chips

Explanation for 2)

8.8 divided by 4 equals 2.2

4.5 divided by 2 equals 2.25

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What is the inverse of the function f(x) = 2x + 1?
BaLLatris [955]

Answer:

f^{-1} = \frac{x-1}{2}

Step-by-step explanation:

f(x) = 2x+1

<em>Replace it with y</em>

y = 2x+1

<em>Exchange the values of  x and y</em>

x = 2y+1

<em>Solve for y</em>

x = 2y+1

<em>Subtracting 1 from both sides</em>

2y = x-1

<em>Dividing both sides by 2</em>

y = \frac{x-1}{2}

<em>Replace it by </em>f^{-1}

So,

f^{-1} = \frac{x-1}{2}

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It would be the first one

Step-by-step explanation:

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I can type 19 words in 38 seconds. How many can I type in 60 seconds?
mel-nik [20]
Hi!

We can solve this by setting up a proportion

\frac{19}{38}  \frac{x}{60}

Solve for x by cross multiplying.

19 x 60 = 1140
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You can type 30 words in 60 seconds

Hope this helps! :)
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