1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lyrx [107]
3 years ago
14

Explain how mental math can be used to estimate a 15% tip on a taxi ride that costs $23.25

Mathematics
2 answers:
sergiy2304 [10]3 years ago
6 0

Answer: 3.4875

Step-by-step explanation:

Here, According to the question,

Total amount is $23.25

100\% = 23.25

⇒1\% = \frac{23.25}{100}

⇒1\%= \frac{0.95}{8}

⇒ 15\%= 15\times \frac{0.95}{8} ( By multiplying 15 on both sides)

⇒ 15\%= \frac{14.25}{8}

⇒  15\%= 3.4875

Thus, 15% of $23.25 is $3.4875



fenix001 [56]3 years ago
3 0
10%=2.33 + half that is 1.17= 3.50 23.25×.15= 3.4875
You might be interested in
A tattoo enthusiast website claims that :
KATRIN_1 [288]

Answer:

The probability that a person is a Millennial given that they have tattoos is 0.5069 (50.69%) or about 0.51 (51%).

Step-by-step explanation:

We have here a case where we need to use Bayes' Theorem and all conditional probabilities related. Roughly speaking, a conditional probability is a kind of probability where an event determines the occurrence of another event. Mathematically:

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

In the case of the Bayes' Theorem, we have also a conditional probability where one event is the sum of different probabilities.

We have a series of different probabilities that we have to distinguish one from the others:

The probability that a person has a tattoo assuming that is a Millennial is:

\\ P(T|M) = 0.47

The probability that a person has a tattoo assuming that is of Generation X is:

\\ P(T|X) = 0.36

The probability that a person has a tattoo assuming that is of Boomers is:

\\ P(T|B) = 0.13

The probability of being of Millennials is:

\\ P(M) = 0.22

The probability of being of Generation X is:

\\ P(X) = 0.20

The probability of being of Boomers is:

\\ P(B) = 0.22

Therefore, the probability of the event of having a tattoo P(T) is:

\\ P(T) = P(T|M)*P(M) + P(T|X)*P(X) + P(T|B)*P(B)

\\ P(T) = 0.47*0.22 + 0.36*0.20 + 0.13*0.22

\\ P(T) = 0.204

For non-independent events that happen at the same time, we can say that the probability of occurring simultaneously is:

\\ P(M \cap T) = P(M|T)*P(T)

Or

\\ P(T \cap M) = P(T|M)*P(M)

But

\\ P(M \cap T) = P(T \cap M)

Then

\\ P(M|T)*P(T) = P(T|M)*P(M)

We are asked for the probability that a person is a Millennial given or assuming that they have tattoos or P(M | T). Solving the previous formula for the latter:

\\ P(M|T)*P(T) = P(T|M)*P(M)

\\ P(M|T) = \frac{P(T|M)*P(M)}{P(T)}

We have already know that

\\ P(T|M) = 0.47\;P(M) = 0.22\;and\;P(T) = 0.204.

Therefore

\\ P(M|T) = \frac{0.47*0.22}{0.204}

\\ P(M|T) = 0.50686 \approx 0.51

Thus, the probability that a person is a Millennial given that they have tattoos is 0.5069 (50.69%) or about 0.51 (51%).

5 0
3 years ago
I need help with this please
kodGreya [7K]
1/5(2x - 10) + 4x = -3(1/5x + 4)
0.4x - 2 + 4x = -0.6x - 12
4.4x - 2 = -0.6x - 12
5x - 2 = -12
5x = -10
x = -2
6 0
3 years ago
Read 2 more answers
5. Original Price: $40 Sale Price: $30
telo118 [61]
It’s %25 off think about it 40-10=30 and that’s %25 of it hope I help you have a good day
5 0
3 years ago
A 100 serving of lasagna divided by 30 people
Misha Larkins [42]

Answer: 0.3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Helppppppppppppppppppppppppppppp
evablogger [386]

Answer: 33

Step-by-step explanation:

(f of g)(2) = f(g(2))

g(2) = -2(2) = -4

f(-4) = (-4)^2 - 3(-4) + 5 =

16 - - 12 + 5 =

16 + 17 =

33

7 0
1 year ago
Other questions:
  • Jaime's refrigerator loan statement said that he would pay $1,026 as interest after 4 years at an interest rate of 13.5%. How mu
    7·1 answer
  • Here are summary statistics for randomly selected weights of newborn​ girls: nequals=174174​, x overbarxequals=30.930.9 ​hg, seq
    14·1 answer
  • 6. Jack is building a rectangular dog pen that he wishes to enclose. The width of the pen is 2
    12·1 answer
  • 2) Choose the letter of the equation that best represents the problem. *
    7·1 answer
  • The dimensions of a parking lot are measured in feet. What units will the area be measured in?
    12·1 answer
  • 1. Scientists randomly select ten groups from a population of men over 50 years old. They calculate the mean
    13·1 answer
  • Professor Walter precisa pintar uma quadra, que tem o formato retangular, cujo comprimento é de 45 m por 38 m. Para isso ele vai
    14·1 answer
  • 15 divided by 3.15 what is the unit rate
    8·1 answer
  • WHAT ARE CONGRUENCE LINES
    14·1 answer
  • I need help with all of this
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!