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Rudiy27
3 years ago
10

Yesterday, Nina's lunch cost $9.80 and she left a $1.47 tip. Today, Nina's lunch cost $12.60. If she tips the same rate that she

did yesterday, how much tip should Nina leave?
Mathematics
1 answer:
Anni [7]3 years ago
8 0
I think the answer is 1.89
Explanation: 9.80 divided by 1.47 is 6 2/3
12.60 divided by 6 2/3 is 1.89
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in a test consisting of 90 questions, Ama answered 75% of the first 40 questions correctly. If she had to get a score of 80% in
Shalnov [3]

Answer:

total question =90

she obtained 75% of first 40 questions

  1. No. of question she got correct in first 40 = 75% * 40 = 30

2. in order to get 80% out of 90,

the no. of questions got correct by Ama = 80% * 90 = 72

3. As she already got 30 c0rrect in first 40 questions, the number of question she needs correct for remaining 50 = (72-30) = 42

percentage = 42/50*100% = 84%

3 0
3 years ago
Help with num 9 please. thanks​
Alik [6]

Answer:

See Below.

Step-by-step explanation:

We want to show that the function:

f(x) = e^x - e^{-x}

Increases for all values of <em>x</em>.

A function is increasing whenever its derivative is positive.

So, find the derivative of our function:

\displaystyle f'(x) = \frac{d}{dx}\left[e^x - e^{-x}\right]

Differentiate:

\displaystyle f'(x) = e^x - (-e^{-x})

Simplify:

f'(x) = e^x+e^{-x}

Since eˣ is always greater than zero and e⁻ˣ is also always greater than zero, f'(x) is always positive. Hence, the original function increases for all values of <em>x.</em>

8 0
3 years ago
Solve 6!<br>pls I need help!!​
dolphi86 [110]

Answer:

deep nutz are for you only

8 0
3 years ago
A box-and-whisker plot. The number line goes from 0 to 9. The whiskers range from 0 to 7, indicated by A and E. The box ranges f
Sladkaya [172]

minimum value: 1

lower quartile: 3

median of the data: 6

upper quartile: 8

maximum value: 14

Sorry for the late answer, i hope this will help you in the future and everyone else who reads this.

6 0
3 years ago
Micah’s bill for dinner was $35.50. He left the server an 18% tip. What is the total amount that Micah paid for dinner including
Lilit [14]

Answer:

$41.89

Step-by-step explanation:

Can I get brainliest please?

7 0
3 years ago
Read 2 more answers
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