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3 years ago

Which fraction is not equivalent to 4/9? *

Mathematics

1 answer:

KiRa [710]3 years ago

4 0

Answer:

8/18

Step-by-step explanation:

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Which of the following equations corresponds to the graph below

alekssr [168]

the answer would be d because it goes down 2 and over 1

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3 years ago

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Pls answer fast pls

Talja [164]

Answer:

d. none of these

Step-by-step explanation:

Area of square= side ×side

Let x meters be the length of a side of the square.

Perimeter= 4(side)

4x= 40

<em>Dividing by 4 throughout:</em>

x= 40 ÷4

x= 10

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3 years ago

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A cheetah was racing a gazelle and a lion. For every 52 of a

bezimeni [28]

Answer:

Step-by-step explanation:

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3 years ago

A Pharmacist whishes to mix a solution that is 6% Minoxidil. She has on hand 100 ml of 4% solution and wishes to add some 8% sol

dangina [55]

Answer:

100

Step-by-step explanation:

Let x be the amount to be added of the second solution. For every 100ml of it 8 units of minoxidil are added. The total amount of solution will be (100 + x), so the final concentration is given by:

$4 / (100 + x) + 0.08x / (100 + x) = 0.06$ [Multiplying by (100 + x)]

$4 + 0.08x = 6 + 0.06x$ [Transposing terms]

$0.08x - 0.06x = 6 - 4$ [ operating]

$0.02x = 2$ [Dividing by 0.02]

$x=100$

4 0

3 years ago

Five males with an X-linked genetic disorder have one child each. The random variable x is the number of children among the fiv

Nesterboy [21]

Answer:

a) It is probability distribution

b) mean = 2.5

c) Standard Deviation = 1.11

Step-by-step explanation:

We are given the following in the question:

x 0 1 2 3 4 5

P(x) 0.033 0.149 0.318 0.318 0.149 0.033

Probability distribution:

$\displaystyle\sum P_i(x_i) = 0.033+ 0.149 +0.318+ 0.318+ 0.149 +0.033 = 1$

Since, the summation of all the probabilities is 1 and each value of probability is between 0 and 1, the given is a probability distribution.

Mean of probability distribution:

$E(x) = \displaystyle\sumx_iP(x_i)\\E(x) = 0(0.033)+ 1(0.149)+2(0.318)+3(0.318) +4(0.149) + 5(0.033)\\E(x) = 2.5$

Thus, the mean of distribution is 2.5

Standard deviation of probability distribution:

$E(x^2) = 0^2(0.033)+ 1^2(0.149)+2^2(0.318)+3^2(0.318) +4^2(0.149) + 5^2(0.033)\\E(x^2) = 7.492\\\sigma^2 = E(x^2) - (E(x))^2\\\sigma^2 = 7.492 - (2.5)^2 = 1.242\\\sigma= \sqrt{1.242} = 1.11$

Thus, the standard deviation of the probability distribution is 1.11

5 0

4 years ago