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marusya05 [52]
3 years ago
14

I NEEDA KNOW IF IM RIGHT , IDK HELP

Mathematics
1 answer:
aliya0001 [1]3 years ago
7 0

Answer:

CD and DE are perpendicular because their slopes are -1/3 and 3

Step-by-step explanation:

Perpendicular lines will always have the opposite reciprocal.

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Which system matches the graph below?
ioda

Answer:

(a)

Step-by-step explanation:

y= -4^{x} and y = 2x - 3

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2 years ago
In the first million digits of pi,how many threes are there?
sergejj [24]
There are 100229 threes in the first million digits in pi.
3 0
3 years ago
Read 2 more answers
(3x + 2y = 7<br> (7x-2y = 3
sineoko [7]
Answer for the equation by elimination

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Q and r are independent events. if p(q) = 1/4 and p(r)=1/5, find p(q and r)
klasskru [66]

Answer:

(b) \frac{7}{30}

Step-by-step explanation:

When two p and q events are independent then, by definition:

P (p and q) = P (p) * P (q)

Then, if q and r are independent events then:

P(q and r) = P(q)*P(r) = 1/4*1/5

P(q and r) = 1/20

P(q and r) = 0.05


In the question that is shown in the attached image, we have two separate urns. The amount of white balls that we take in the first urn does not affect the amount of white balls we could get in the second urn. This means that both events are independent.


In the first ballot box there are 9 balls, 3 white and 6 yellow.

Then the probability of obtaining a white ball from the first ballot box is:

P (W_{u_1}) = \frac{3}{9} = \frac{1}{3}

In the second ballot box there are 10 balls, 7 white and 3 yellow.

Then the probability of obtaining a white ball from the second ballot box is:

P (W_{u_2}) = \frac{7}{10}

We want to know the probability of obtaining a white ball in both urns. This is: P(W_{u_1} and W_{u_2})  

As the events are independent:

P(W_{u_1} and W_{u_2})  = P (W_{u_1}) * P (W_{u_2})

P(W_{u_1} and W_{u_2})  = \frac{1}{3}* \frac{7}{10}

P(W_{u_1} and W_{u_2})  = \frac{7}{30}

Finally the correct option is (b) \frac{7}{30}

3 0
3 years ago
Write 0.00052 in scientific notation.
Kamila [148]

10 over the power of negative 4

4 0
3 years ago
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