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3 years ago

Help asap on all three thanks

Mathematics

1 answer:

mash [69]3 years ago

5 0

1. All negative numbers added together are still negative

2. There is a proof and a theorem for it.

3. If it is an animal, then it has fur

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Jose makes a triangle using three sticks of lengths 20 inches, 21 inches, and 28 inches. Is the

bogdanovich [222]

Answer:

no because for right angle triangle the sum of the sq of the two smallest side is equal to the sq of biggest side

6 0

3 years ago

HURRY IM TIMED! <br><br> what is the value of x if e^2x+6= 8

saveliy_v [14]

Answer:

exact form x = 2/e^2 decimal form is x = 0.27

Step-by-step explanation:

5 0

3 years ago

Gears produced by a grinding process are categorized either as conforming (suitable for their intended purpose), downgraded (uns

Svetach [21]

Answer:

A. P=0.4013

B. P=0.9884

C. P=0.3222

Step-by-step explanation:

We can model this with a binomial random variable.

The sample size is n=10.

The probability is p=0.05 for scrap and p=0.05+0.15=0.20 for degraded or scrap.

The probability of having k scrap gears in the sample is:

$P(x=k) = \dbinom{n}{k} p^{k}(1-p)^{n-k}\\\\\\P(x=k) = \dbinom{10}{k} 0.05^{k} 0.95^{10-k}\\\\\\$

The probability that one or more is scrap can be calculated as 100% less the probability that no one is scrap:

$P(x\geq1)=1-P(x=0)\\\\\\P(x=0) = \dbinom{10}{0} p^{0}(1-p)^{10}=1*1*0.5987=0.5987\\\\\\P(x\geq1)=1-0.5987=0.4013$

The probability that 8 or more are not scrap is equal to the probability of having 2 or less that are scrap:

$P(x\leq2)=P(x=0)+P(x=1)+P(x=2)\\\\\\P(x=0) = \dbinom{10}{0} p^{0}(1-p)^{10}=1*1*0.5987=0.5987\\\\\\P(x=1) = \dbinom{10}{1} p^{1}(1-p)^{9}=10*0.05*0.6302=0.3151\\\\\\P(x=2) = \dbinom{10}{2} p^{2}(1-p)^{8}=45*0.0025*0.6634=0.0746\\\\\\P(x\leq2)=0.5987+0.3151+0.0746=0.9884$

The probability that more than two are degraded or scrap (p=0.2) is calculated as:

$P(x>2)=1-P(x\leq2)=1-(P(x=0)+P(x=1)+P(x=2))\\\\\\P(x=0) = \dbinom{10}{0} p^{0}(1-p)^{10}=1*1*0.1074=0.1074\\\\\\P(x=1) = \dbinom{10}{1} p^{1}(1-p)^{9}=10*0.2*0.1342=0.2684\\\\\\P(x=2) = \dbinom{10}{2} p^{2}(1-p)^{8}=45*0.04*0.1678=0.3020\\\\\\P(x>2)=1-(0.1074+0.2684+0.3020)=1-0.6778=0.3222$

4 0

3 years ago

How many subsets will the sets have? {sheep that have eight legs }

Vikentia [17]

Answer:

256

Step-by-step explanation:

How to find subsets = 2 raise the power n.

N=number of elements in a set.

=2raise the power 8 which is 256.

8 0

3 years ago

Joshi's football team has never scored more than 31 points in a game. Which inequality represents the number of points that they

Lemur [1.5K]

Answer: n > 31

Step-by-step explanation:

From the question, we are informed that Joshi's football team has never scored more than 31 points in a game.

The inequality that represents the number of points that they would need to score to beat their record will be to have a number that is greater than 31.

This will be n > 31

6 0

3 years ago