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xxMikexx [17]
3 years ago
8

Solve using linear combination 5x+2y=10 3x+2y=6

Mathematics
1 answer:
defon3 years ago
8 0

Answer:

x=2, y=0

Step-by-step explanation:

2y=6-3x

5x+(6-3x)=10

2x+6=10

2x+4

x=2

Now plug in x to find y

5(2)+2y=10

10+2y=10

y=0

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Answer:

Yes, the bathroom has enough water and shampoo for all of them.

Step-by-step explanation:

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Putting 8 into L and 7 into S, gives:

70(8) + 60(7) = 560 + 420 = 980

That is definitely less than 5600, so water is OK.

Now,

0.02L + 0.01S

Putting 8 into L and 7 into S, gives:

0.02(8) + 0.01(7) = 0.16 + 0.07 = 0.23

That's definitely less than 2.5 liters, so shampoo is OK as well.

Hence, bathroom has enough water and shampoo for them.

7 0
3 years ago
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3 years ago
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RideAnS [48]
The answer is A) -4/25 because when you multiply 8/15 and -3/10, you can simplify the expression to 4/5 times -1/5, which equals -4/25.  
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The screening process for detecting a rare disease is not perfect. Researchers have developed a blood test that is considered fa
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Answer:

Type I: 1.9%, Type II: 1.6%

Step-by-step explanation:

given null hypothesis

H0=the individual has not taken steroids.

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⇒   actually the null hypothesis is true⇒the individual has not taken steroids.

 but we rejected it ⇒our prediction is the individual has taken steroids.

typr II error- not rejecting null hypothesis when it has to be rejected

⇒actually null hypothesis is false ⇒the individual has taken steroids.

but we didnt reject⇒the individual has not taken steroids.

let us denote

the individual has taken steroids by 1

the individual has not  taken steroids.by 0

                            predicted

                              1       0

   actual          1    98.4%  1.6%

                        0   1.9%   98.1%

so for type 1 error  

 actual-0

predicted-1

therefore from above table we can see that probability of Type I error is 1.9%=0.019

so for type II error

   actual-1

predicted-0

therefore from above table we can see that probability of Type I error is 1.6%=0.016

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