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jok3333 [9.3K]
2 years ago
6

I donot understand what so ever but brainly has def been helping

Mathematics
1 answer:
faltersainse [42]2 years ago
4 0

Answer:

what happened to you brooooooooo

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becky rides her scooter to work. it takes her 40 minutes to go 3 miles. if she continues at the same rate, how long will it take
Alika [10]
15 miles is five times 3 miles.
It will take 40*5=200 minutes to go 15 miles.
200 minutes = 3+20/60 hours = 3hrs 20min
5 0
4 years ago
Read 2 more answers
Help pls!! this is a presentation I’m doing in class and I NEED this completed rn, ASAP!!! . What I need is just the answers for
Diano4ka-milaya [45]

15. 70° because a right angle is 90° and we have the angle of ADB which is 20°. So 90°-20°=70°.

16. 70° because angle PSQ is 60° and angle QSR is 10°. So 60°+10°=70°.

17. 55° because it says it in the explanation. I assume this is a typo and they meant to ask the measurement of ADC and in that case it would be 130° because angle ADB is 75° and angle BDC is 55°. 75°+55°=130°.

18. 40° because angle PSQ is a right angle which means it's 90°. So 130°-90°=40°.

19. 140° because angle ADB is 120° and angle BDC is 20° so 120°+20°=140°.

20. 125° because again it's in the explanation. But if it's a typo and they meant what is the measurement of PSQ then it is 50° because PSR is 125° and QSR is 75° so 125°-75°=50°.

Hope this helps! :)

5 0
3 years ago
Kyle Eunice has 78 blocks. She stacked it in such a way that the topmost row has one block, the row below it has two blocks, and
myrzilka [38]

Answer:

12

Step-by-step explanation:

1

2

3

4

5

6

7

8

9

10

11

12

1+2+3+4+5+6+7+8+9+10+11+12=78

6 0
3 years ago
Determine the product, h(x), of the linear and quadratic factors.
Airida [17]

Answer:

h(x)=x^3-17x-4

Step-by-step explanation:

Given f(x)=x^2 - 4x -1\ and\ g(x)=x+4\\

h(x)=f(x)\times g(x)

(x^2-4x-1)(x+4)\ \ \\Distribute\ parenthesis\\=x^2x+x^2\times \:4+\left(-4x\right)x+\left(-4x\right)\times \:4+\left(-1\right)x+\left(-1\right)\times \:4

Apply minus-plus rules

+(-a)=-a

=x^2x+4x^2-4x(x)-4\times\:4x-1\times\:x-1\times\:4

\\Simplify\\=x^3+4x^2-4x^2-16x-x-4\\=x^3-16x-x-4\\=x^3-17x-4

h(x)=x^3-17x-4

6 0
4 years ago
The length of time for one individual to be served at a cafeteria is an exponential random variable with mean of 6 minutes. Assu
denis-greek [22]

Answer:

43.46% probability that the person will need to wait at least 9 minutes total

Step-by-step explanation:

To solve this question, we need to understand conditional probability and the exponential distribution.

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.

Expontial distribution:

The exponential probability distribution, with mean m, is described by the following equation:

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

In which \mu = \frac{1}{m} is the decay parameter.

The probability that x is lower or equal to a is given by:

P(X \leq x) = \int\limits^a_0 {f(x)} \, dx

Which has the following solution:

P(X \leq x) = 1 - e^{-\mu x}

The probability of finding a value higher than x is:

P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}

In this question:

Event A: Waited at least 4 minutes.

Event B: Waiting at least 9 minutes.

The length of time for one individual to be served at a cafeteria is an exponential random variable with mean of 6 minutes.

This means that m = 6, \mu = \frac{1}{6}

Probability of waiting at least 4 minutes.

P(A) = P(X \geq 4) = P(X > 4)

P(A) = P(X > 4) = e^{-\frac{4}{6}} = 0.5134

Intersection:

The intersection between a waiting time of at least 4 minutes and a waiting time of at list 9 minutes is a waiting time of 9 minutes. So

P(A \cap B) = P(X > 9) = e^{-\frac{9}{6}} = 0.2231

What is the probability that the person will need to wait at least 9 minutes total

P(B|A) = \frac{0.2231}{0.5134} = 0.4346

43.46% probability that the person will need to wait at least 9 minutes total

8 0
4 years ago
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