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3 years ago

HELLP THIS IS EASY 8TH GRADE STUFF BUT

Mathematics

1 answer:

Ket [755]3 years ago

7 0

Answer:

6/14

Step-by-step explanation:

you need to just divide the denominator and numerator by 5. 30 / 5 is 6 and 70 / 5 is 14 so your answer is 6 / 14.

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0.03 is 10 times as much as what

nikitadnepr [17]

Divide 0.03 by 10.
This will give you 0.003 which is your answer.
To check, just multiply 0.003 by ten and you'll see that 0.03 is 10x more than it.

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4 years ago

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What is 4x^2-1/ (x+4) (2x-1) simplified

Nadusha1986 [10]

Answer:

Step-by-step explanation:

$\frac{4x^2 - 1}{(x+4)(2x-1)} = \frac{(2x)^2 - (1)^2}{(x+4)(2x-1)}$

$=\frac{(2x-1)(2x+1)}{(x+4)(2x-1)}\\\\=\frac{2x+1}{x+4}$

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3 years ago

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The probability that a mature hen will lay an egg on a given day is 0.80. Hannah has 12 hens. What is the probability that 10 of

OleMash [197]

Answer: 0.28

Step-by-step explanation:

Binomial probability formula :

$P(X=x)=\ ^nC_xp^x(1-p)^x$ , where x = Number of success , n= sample size , p= probability of success for each trial.

Let x = Number of hens lay eggs.

then, p= 0.80

n= 12

For x=10

$P(x=10)=\ ^{12}C_{10}(0.80)^{10}(0.20)^{2}\\\\=\dfrac{12!}{10!2!}\times 0.1073741824\times 0.04\\\\\approx0.28$

Hence, the required probability = 0.28

3 0

3 years ago

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Convert 0.345634563456…to a rational number in the form of ab, where b≠0.

alexandr1967 [171]

A standard trick for finding the rational form of a repeated decimal:

$x=0.34563456\ldots=0.\overline{3456}$

Multiply by an appropriate power of 10 to move one "cycle" of the repeated pattern to the left side of the decimal point:

$\implies10^4x=3456.34563456\ldots=3456.\overline{3456}$

Now subtract $x$ from this number and we lose the fractional part:

$\implies10^4x-x=9999x=3456$

And from here you can solve for $x$ .

$\implies x=\dfrac{3456}{9999}=\dfrac{384}{1111}$

8 0

4 years ago

The size of a television is usually indicated by the length of the screens diagonal if a person buys a 20 inch television set th

ipn [44]

diagonal = sqrt(a^2 +b^2)

20 = sqrt(12^2 +b^2)

20= sqrt(144+b^2)

20^2 = 144 + b^2

400 = 144 + b^2

256 = b^2

b = sqrt(256) = 16

it is 16 inches wide

8 0

3 years ago