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dem82 [27]
3 years ago
7

ormula1" title=" \frac{x}{5}+\frac{3x}{15}=\frac{2x}{3} } " alt=" \frac{x}{5}+\frac{3x}{15}=\frac{2x}{3} } " align="absmiddle" class="latex-formula">+2 Answer plz math help
Mathematics
1 answer:
Bezzdna [24]3 years ago
4 0
Multiply all terms by 15
3x+3x= 10x+30

Combine like terms
6x=10x+30

Subtract 10x from both sides
-4x=30

Divide both sides by -4
x= -7.5

Final answer: -7.5
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If p(a | b) = 0.4, p(b) = 0.8, and p(a) = 0.5, are the events a and b independent?
pashok25 [27]

The events A and B are not independent.

Given that,

                  P(A|B) = 0.4

                  P(A) = 0.5

                  P(B) = 0.8

Two events A and B are said to be independent, if P(A∩B) = P(A) P(B)

We have, P(A|B) = P(A∩B)/P(B)

Therefore, P(A∩B) = P(A|B) P(B) = 0.4 x 0.8 = 0.32

Now P(A) P(B) = 0.5 x 0.8 = 0.4

So P(A∩B) ≠ P(A)P(B)

Therefore, the events A and B are not independent.

Learn more about independent events at brainly.com/question/22881926

#SPJ4

7 0
1 year ago
An air balloon begins it's decent to the ground at 1000 ft above the ground and falls at a rate of 50 ft per minute. Select all
Radda [10]

Answer:

The correct options are 3, 4 and 5.

Step-by-step explanation:

It is given that an air balloon begins it's decent to the ground at 1000 ft above the ground and falls at a rate of 50 ft per minute.

It means the initial height of air balloon is 1000. So, the y-intercept is (0,1000).

The ball falls at a rate of 50 ft per minute. So, the rate of change is

m=-50

The height of balloon is defined as

h(x)=-50x+1000                      [\because y=mx+b]

Where, x is time in minutes.

The balloon will reach the ground when h(x)=0

0=-50x+1000

50x=1000

x=20

Therefore the options 3, 4 and 5 are correct.

4 0
3 years ago
Does it seem plausible that employment has a normal distribution for each gender
Debora [2.8K]

yes it is reasonable that employment has a normal distribution for each gender

6 0
3 years ago
Please do all of these :)
wariber [46]
A SCATTER PLOT IS JUST A DOT PLOT
6 0
3 years ago
Suppose there are 20 questions on a multiple choice test.if 25% of the answers are choice b how many of the answers are not choi
zvonat [6]

Answer:

are not choice b 75%

75/100 *20 = 1500/100=15

Step-by-step explanation:

6 0
3 years ago
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