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3 years ago

8

Lol I’m still having trouble with Solve the system of linear equations using substitution. Can someone tell me what i did wrong

on this problem. X is one and I keep getting 0

1 answer:

pav-90 [236]3 years ago

5 0

Answer:

first of all multiply the second eqn *6

so that we can cancel one

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1) Given P(A) = 0.3 and P(B) = 0.5, do the following.

Delicious77 [7]

Answer:

1) a) 0.8

b) 0.6

2) a) 0.08

b) 0.14

Step-by-step explanation:

1) Given

$P(A) = 0.3$ and $P(B) = 0.5$

Let us learn about a formula:

$P(A\ or\ B) = P(A) +P(B) -P(A\ and\ B)\\OR\\P(A\cup B) = P(A) +P(B) -P(A\cap B)$

(a) If A and B are mutually exclusive i.e. no common thing in the two events.

In other words:

$P(A\ and\ B)$ = $P(A \cap B)$ = 0

Using above formula:

$P(A\ or\ B) = P(A) +P(B) -P(A\ and\ B)\\\Rightarrow P(A\ or\ B) = 0.3 + 0.5 -0 = \bold{0.8}$

(b) P(A and B) = 0.2

Using above formula:

$P(A\ or\ B) = P(A) +P(B) -P(A\ and\ B)\\\Rightarrow P(A\ or\ B) = 0.3 + 0.5 -0.2 = \bold{0.6}$

*************************************

1) Given

$P(A) = 0.4$ and $P(B) = 0.2$

Let us learn about a formula:

$P(A\ and\ B) = P(B) \times P(A/B)$ for dependent events

$P(A\ and\ B) = P(A) \times P(B)$ for independent events.

(a) If A and B are independent events :

Using the above formula for independent events:

$P(A\ and\ B) = 0.4 \times 0.2 = \bold{0.08}$

(b) $P(A / B) = 0.7$

Using above formula:

$P(A\ and\ B) = P(B) \times P(A/B) = 0.2 \times 0.7 = \bold{0.14}$

6 0

3 years ago

Ronch [10]

B.
Is the correct answer

3 0

3 years ago

Help! This is so confusing please

Rus_ich [418]

Given equation is $f(x)=6^x$

Now it says to find f(2)

that simply means plug x=2 because we see that 2 is written in place of x in f(x) and f(2)

$f(2)=6^2$

$f(2)=6*6$

$f(2)=36$

Hence final answer is $f(2)=36$

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3 years ago

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Will give brain thingy if you get this right.

PolarNik [594]

1 less than or greater than -2

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2 years ago

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Which of the terms are like terms?<br> 4x and 3y<br> 4x and -2x<br> 3y and -2x

gregori [183]

Answer:

4x and -2x

Step-by-step explanation:

They have 2 of the same variable unlike the others

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3 years ago

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