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AVprozaik [17]
3 years ago
10

Need answer quickly ;D

Mathematics
1 answer:
Strike441 [17]3 years ago
7 0

Answer:

I think it is the last one

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P(A)=.50 P(B)=.40, and P(A and B) = .15 what is P(a and B)
seropon [69]

Answer:

0.75

Step-by-step explanation:

3 0
3 years ago
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Solve x^2 +14x=15 by completing the square
ivanzaharov [21]

Answer:

x = -15 and x = 1

Step-by-step explanation:

Since we have to use the complete the square method, we first need to <u>rewrite the equation</u> in the form x^{2}+2ax+a^{2}=(x+a)^{2}.

This results in x^{2} + 14x + 7^{2} = 15 + 7^{2}.

Next, we <u>simplify the equation</u> to get x^{2} +14x+7^{2} = 64.

<u>Factoring </u>the left side gives us (x+7)^{2} = 64.

Finally we <u>solve the equations</u>: x+7=\sqrt{64} and x+7=-\sqrt{64}.

This gives us  x=1, and x=-15

6 0
3 years ago
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How do you simplify fractoins
VARVARA [1.3K]
Find the GCF of both numerator and denominator and then divide both the denominator and numerator by that and you will get the simplified fraction.
6 0
3 years ago
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Kevin wants to buy an area rug for his living room. He would like the area rug to be no smaller that 24 square feet and no bigge
Julli [10]

Answer: 6 feet to 8 feet

Step-by-step explanation: 6x4=24 8x6=48

5 0
3 years ago
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Find the critical value of t for a sample size of 23 and a 99% confidence level. choose the correct value from below:
Kay [80]
We can find critical value by using t - table.
For using t - table we need degree of freedom and alpha either for two tailed test or one tailed test.
We can determine degree of freedom by subtracting sample size from one.
So in given question sample size is 23. So we can say degree of freedom(df) for sample size 23 is
df = 23 - 1= 22
Now we have to go on row for degree of freedom 22.

After that we need to find alpha either for two tailed test or one tailedl test.
Confidence level is 99%. We can convert it into decimal as 0.99.

So alpha for two tailed test is 100 - 0.99 = 0.01

Alpha for one tailed test is 0.01/2 = 0.005.

So we will go on column for 0.01 for two tailed test alpha or 0.005 for one tailed test alpha.
 SO the critical value 22 degree of freedom and 0.01 two tailed alpha is 2.819 from t - table.

8 0
3 years ago
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