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2 years ago

Two-variable linear equations 2x – 5y = 20

1 answer:

7 0

Y= (2x-20)/ 5 then you replace y so with a simple calculation u get x than u replace x with it value to get y as simple as that

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Roll two fair dice. Each die has six faces. A. Let A be the event that either a 3 or 4 is rolled first followed by an odd number

zhenek [66]

Answer:

A. 0.16

B. 0.58

C. No

D. Dependent

Step-by-step explanation:

The sampling space has 36 outcomes.

The event A has 6 outcomes (3,1), (3,3), (3,5), (4,1), (4,3),(4,5)

So P(A)= 6/36 = 0.16

The table in the picture shows the 15 outcomes that are not allowed, so there are 36-15 = 21 possible outcomes for B and its probability is 21/36 = 0.58

Are A and B mutually exclusive events?

No since their intersection is not empty, for example (3,1) belongs to both A and B

In order for A and B to be independent, it must happen that

P(A∩B)=P(A)P(B)

A∩B={(3,1),(3,3),(4,1)} so P(A∩B) = 3/36

whereas

P(A)P(B) = (6/36)(21/36) = (1/6)(7/12)=7/72

So A and B are not independent.

7 0

3 years ago

Find AM, if AM = 6y-4 and MC = 2y+12.

aleksley [76]

Answer: 20

Step-by-step explanation:

Since Line l is a segment bisector, we know that AM and MC are equal to each other.

6y-4=2y+12 [subtract both sides by 2y]

4y-4=12 [add both sides by 4]

4y=16 [divide both sides by 4]

y=4

Now that we have y, we plug that into AM.

6(4)-4 [multiply]

24-4 [subtract]

Now, we know that AM is 20.

6 0

2 years ago

an older person is three years older than seven times the age of a younger person the sum of their ages is 43 find their ages

ruslelena [56]

Step-by-step explanation:

no thanksssssssssssssssssss

6 0

2 years ago

Evaluate the expression 4b-6d if b=7 and d=3

Delicious77 [7]

Answer:

Step-by-step explanation:

4b - 6d = 4*7 - 6*3

= 28 - 18

= 10

4 0

3 years ago

Read 2 more answers

For all a not equal to 0, which of the following expressions is equivalent to (picture)

motikmotik

Its E...........................................

3 0

2 years ago