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Veseljchak [2.6K]
2 years ago
6

Which of the following expressions has a solution of -2

Mathematics
1 answer:
stealth61 [152]2 years ago
6 0

Answer:

j. 1st, 2nd and 3rd

Step-by-step explanation:

hope it helps

please mark as Brainliest

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From experience, it is known that on average 10% of welds performed by a particular welder are defective. if this welder is requ
bulgar [2K]
Binomial distribution can be used because the situation satisfies all the following conditions:1. Number of trials is known and remains constant (n)2. Each trial is Bernoulli (i.e. exactly two possible outcomes) (success/failure)3. Probability is known and remains constant throughout the trials (p)4. All trials are random and independent of the othersThe number of successes, x, is then given byP(x)=C(n,x)p^x(1-p)^{n-x}whereC(n,x)=\frac{n!}{x!(n-x)!}
Here we're given
p=0.10  [ success = defective ]
n=3

(a) x=0
P(x)=C(n,x)p^x(1-p)^{n-x}
=C(3,0)0.1^0(1-0.1)^{3-0}
=1(1)(0.729)
=0.729

(b) x=2
P(x)=C(n,x)p^x(1-p)^{n-x}
=C(3,2)0.1^2(1-0.1)^{3-2}
=3(0.01)(0.9)
=0.027

(c) x ≥ 2
P(x)=\sum_{x=2}^3C(n,x)p^x(1-p)^{n-x}
=P(2)+P(3)
=C(n,2)p^2(1-p)^{n-2}+C(n,3)p^3(1-p)^{n-3}
=C(3,2)0.1^2(1-0.1)^{3-2}+C(3,3)0.1^3(1-0.1)^{3-3}
=3(0.01)(0.9)+1(0.001)1
=0.027+0.001
=0.028


8 0
3 years ago
Triangle EFG is proportional to triangle EHI. The length of side EF is 5 in., the length of side FH is 3 in., and the length of
SVETLANKA909090 [29]

Answer:

I don't see the file with it

Step-by-step explanation:

5 0
2 years ago
I NEED HELPPPPP. SOMEONE ANSWER THISSSS
Inga [223]

Answer:y=415 x = 21.5

Step-by-step explanation:

We can see 4x-37 = 49

4x = 86

x = 21.5

4(21.5) -3 = 83

Then we can see what the other side is because they are equal

y/5 = 83

83 x 5 = 415

y=415

3 0
3 years ago
Read 2 more answers
The curb weight of a new car is 3,347 pounds. How much does the car weigh?
frozen [14]

Answer:

A

Step-by-step explanation:

i think

4 0
3 years ago
If GF = 3.2 ft, which is a possible measure of TS?
iVinArrow [24]

Answer:

C. 3.2

If GF = 3.2 a possible measure of TS is 3.2

6 0
3 years ago
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