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Luba_88 [7]
4 years ago
7

You spent 87.70 and you want to leave a 20% tip. How much would the tip be?​

Mathematics
2 answers:
vichka [17]4 years ago
6 0

Answer:

17.54  I<u><em>f i can get brainliest that would be great</em></u>

Step-by-step explanation:

to help you next time:

You can find 10% of your bill by moving the decimal one place to the left.  If 26.50 is 100% then 10% is 2.65.  Since 20% is 2 times 10%, 20% of the bill is 2.65 + 2.65 = 5.30.  Now you know the tip you could leave ranging from poor to good, $2.65 to $5.30.  To find 15%, halfway in between, we know 15% is 10% plus 1/2 of 10% (5%).  2.65 plus about 1.30 is 3.95.

Now you have

10% is 2.65 - by moving decimal 1 place left

15% is 3.95 - 10% + 1/2 of 10%

20% is 5.30 - 10% * 2

Julli [10]4 years ago
5 0

Answer:

$17.54

Step-by-step explanation:

Change the percentage to a decimal by dividing it by 100

20/100 = 0.2

Then multiply it by the cost

87.70(0.2) = 17.54

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When playing the roulette at a casino, you have exactly 1/35 chance of winning in each round if you play a single number. Your f
Vikentia [17]

Answer:

0.2275 = 22.75% probability that you actually won that round

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Fireworks going off

Event B: You won

Probability of fireworks going off.

100% of 1/35 = 0.0286(when you win)

10% of 34/35 = 0.9714(you lost). So

P(A) = 0.0286 + 0.1*0.9714 = 0.12574

Probability of you winning and fireworks going off:

100% of 1/35, so P(A \cap B) = 0.0286

If you failed to see the outcome of a round, but you see the fireworks going off, then what is the probability that you actually won that round?

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.0286}{0.12574} = 0.2275

0.2275 = 22.75% probability that you actually won that round

8 0
3 years ago
Which numbers are divisible by 9
tankabanditka [31]
<span>A number is divisible by 9, if the sum is a multiple of 9 or if the sum of its digits is divisible by 9.

</span>
7 0
3 years ago
Read 2 more answers
Will mark brainliest and 25 points please help c:
ValentinkaMS [17]
Third angle = 180 - (44 + 72) = 180 -  116 = 64 degrees answer
3 0
3 years ago
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hope it's helpful.

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The measures of the angles of a triangle are in the ratio 1: 4: 5. What is the measure of the smallest angle?
Eduardwww [97]

Answer:

The measures of the angles are 18°, 72°, and 90

Step-by-step explanation:

I hope i am right if not tell me

6 0
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