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
blsea [12.9K]
3 years ago
10

Erika ran 2 miles in 18 mintes and 3 miles in 27 minutes​

Mathematics
2 answers:
Stells [14]3 years ago
8 0
In she ran 5miles and 45minutes
Montano1993 [528]3 years ago
7 0
Therefore? What needs to be solved?
You might be interested in
Gollum eats fish on alternate days.How often doea he eat fish on a Monday?
VikaD [51]
He eats fish every other Monday
4 0
3 years ago
Read 2 more answers
Use the quadratic formula to solve the equation.–x2 + 5x = 3
Karo-lina-s [1.5K]

Given the equation - x² + 5x = 3, which can be rewritten as:

- x² + 5x - 3 = 0

where a = -1, b = 5 and c = -3.

Quadratic formula:

\frac{-b\text{ }\pm\text{ }\sqrt[]{b^2\text{ - 4ac}}}{2a}

Now, we just replace the values of a, b and c on the equation above.

\frac{-5\text{ }\pm\text{ }\sqrt[]{5^2\text{ - 4(-1)(3)}}}{2(-1)}

=

\frac{5}{2}\text{ }\pm\text{ }\frac{\sqrt[]{13}}{2}

4 0
1 year ago
Given the following geometric sequence, find the common ratio: {3, 18, 108, ...).
vodomira [7]
Geometric sequences go up due to a common ratio. Here the common ratio can be worked out by dividing a term by its previous term e.g term 2 divided by term 1.

18/3 = 6


Therefore the common ratio is 6.
4 0
2 years ago
Help me pleaseeeeeeeeeee
vazorg [7]

Answer: 11 people have a brother in the left circle, 6 people have neither in the center circle, and 9 people have a sister in the far right circle.

5 0
3 years ago
A gambler has a coin which is either fair (equal probability heads or tails) or is biased with a probability of heads equal to 0
yawa3891 [41]

Answer:

(a) 0.1719

(b) 0.3504

Step-by-step explanation:

For every coin the number of heads follows a Binomial distribution and the probability that x of the 10 times are heads is equal to:

P(x)=\frac{n!}{x!(n-x)!}*p^x*(1-p)^{10-x}

Where n is 10 and p is the probability to get head. it means that p is equal to 0.5 for the fair coin and 0.3 for the biased coin

So, for the fair coin, the probability that the number of heads is less than 4 is:

P(x

Where, for example, P(0) and P(1) are calculated as:

P(0)=\frac{10!}{0!(10-0)!}*0.5^0*(1-0.5)^{10-0}=0.0009\\P(1)=\frac{10!}{1!(10-1)!}*0.5^1*(1-0.5)^{10-1}=0.0098

Then, P(x, so there is a probability of 0.1719 that you conclude that the coin is biased given that the coin is fair.

At the same way, for the biased coin, the probability that the number of heads is at least 4 is:

P(x\geq4 )=P(4)+P(5)+P(6)+...+P(10)

Where, for example, P(4) is calculated as:

P(4)=\frac{10!}{4!(10-4)!}*0.3^4*(1-0.3)^{10-4}=0.2001

Then, P(x\geq4 )=0.3504, so there is a probability of 0.3504 that you conclude that the coin is fair given that the coin is biased.

7 0
3 years ago
Other questions:
  • Similar figures always have .....?
    15·2 answers
  • What is 5/15 + 5? I have to write 20 charecters so idk what else to say.
    5·2 answers
  • During a basketball game a player makes 12 of 18 free throws attempted write the ratio as fraction reduced to the lowest term
    11·2 answers
  • Ellen is making jewelry sets that contain a bracelet and a pair of earrings. Each bracelet uses 3 times as many beads as one ear
    10·1 answer
  • At XYZ Middle School, 40 percent of the 500 students ride their bikes or walk to school. How
    13·1 answer
  • At the movie theatre, child admission is $5.70 and adult admission is $9.75 . On Friday, 173 tickets were sold for a total sales
    9·1 answer
  • A cell phone provider offers a plan that costs ​$40 per month plus ​$0.20 per text message sent or received. A comparable plan c
    6·1 answer
  • The product of two positive integers us 2005. F neither integer is 1, what is the sum of the two integers?
    6·1 answer
  • You invest $500 in an account that has a annual interest rate of 5%, compounded quarterly for four years. What is the equivalent
    13·1 answer
  • We can’t understand how to find the pattern
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!