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Sav [38]
3 years ago
12

Help me solve this equation

Mathematics
1 answer:
klio [65]3 years ago
7 0

Answer:

9 is the value of a in the equation

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Someone please help me.
sp2606 [1]

None of the above? Sorry of this is incorrect im 90% sure though

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3 years ago
(a.) Vivian bought one bulb for $4. How many bulbs can Vivian buy if she has $128?
Shalnov [3]

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D because it’s D give me brainless

Step-by-step explanation:

8 0
2 years ago
Value of x is in solution set of 8x-6>12+2x
quester [9]

Answer:

x>3

Step-by-step explanation:

8x-6>12+2x

Subtract 2x from each side

8x-2x-6>12+2x-2x

6x -6 > 12

Add 6 to each side

6x-6 +6 > 12+6

6x> 18

Divide each side by 6

6x/6 >18/6

x>3

8 0
4 years ago
If 9 less than 6x lies between 31 and 37, what is x
stich3 [128]

Answer:

7, if x has to be an integer.

Step-by-step explanation:

6 0
3 years ago
10 snails is to be chosen from this population. Find the probability that the percentage of streaked-shelled snails in the sampl
Alex17521 [72]

Here is the full question:

The \  shell \   of  \ the \  land  \ snail \  Limocolaria  \ martensiana  \ has \  two  \ possible  \ colorforms:  \ streaked  \ and  \ pallid.  \ In  \  a \ certain \  population  \ of  \ these   \ snails,  \ 60\%  \ o f  \ theindividuals \  have  \ streaked  \ s hells.\ 16  \ Suppose  \ that  \ a  \ random \ sample  \ of \  10  \ snailsis \  to  \ be \ chosen  \ from  \ this \  population.  \ F ind  \ the  \ probabilit y \  that  \ the  \ percentage  \ of

streaked-shelled  \ snails   \ in  \ t he  \ sample \  will  \ be

(a) 50\%. \  (b) 60\%.  \ (c) 70\%.

Answer:

(a) 0.2007

(b) 0.2510

(c) 0.2150

Step-by-step explanation:

Given that:

The sample size = 10

Sample proportion= 60% 0.6

Let X represents the no of streaked-shell snails.

X \sim Binom (n =1 0, p = 0.60)

The Probability mass function (X) is:

P(X =x)= (^n_x) p^x(1-p)^{n-x}; x = 0,1,2,3...

The Binomial probability with mean μ = np

= 10 * 0.6

= 6

Standard deviation σ = \sqrt{np(1-p)}

= \sqrt{10*0.6*(1-0.6)}

= 1.55

The probability that the percentage of the streaked-shelled snails in the sample will be:

a)

P(X = 0.5) = ^nC_x p^x (1 -p) ^{(n-x)}

= ^{10}^C_5 * (0.6)^5(1-0.6)^{10-5}

= \dfrac{10!}{5!(10-5)!} * (0.6)^5(1-0.6)^{10-5}

= 0.2007

b)

P(X = 0.6) = ^nC_x p^x (1 -p) ^{(n-x)}

= ^{10}^C_6 * (0.6)^6(1-0.6)^{10-6}

= \dfrac{10!}{6!(10-6)!} * (0.6)^6(1-0.6)^{10-6}

= 0.2510

c)

P(X = 0.7) = ^nC_x p^x (1 -p) ^{(n-x)}

= ^{10}^C_7 * (0.6)^7(1-0.6)^{10-7}

= \dfrac{10!}{7!(10-7)!} * (0.6)^7(1-0.6)^{10-7}

= 0.2150

7 0
3 years ago
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