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3 years ago

PLEASE HELP FOR BRAINLIEST! ;)

Mathematics

1 answer:

IrinaVladis [17]3 years ago

5 0

1. D - Since it's random, everyone has an equal chance of being picked

2. B - Since the people are already registered voters it would be easier to get a response from them. Plus, picking ever 10th person makes it random.

3. false - a fair question wouldn't make assumptions about the population

4. B - "Don't you think" causes the answerer to be pushed towards saying yes

hope this helps :)

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Normal simple question and pls follow

Alenkinab [10]

Answer:

850

Step-by-step explanation:

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3 years ago

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Whars 0.84 repeating as a fraction in simplest form?

madam [21]

Answer:

28/33

Step-by-step explanation:

Let x represent the value of the fraction.

$x=0.\overline{84}\\100x=84.\overline{84}\\100x-x=99x=84.\overline{84}-0.\overline{84}=84\\\\x=\dfrac{84}{99}\qquad\text{divide by 99}\\\\x=\dfrac{28}{33}\qquad\text{in simplest terms}$

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A recipe for apple cake needs 10 mL of baking powder, 70 mL of butter, 190 mL of sugar and 420 mL of flour. This is enough to ma

Pepsi [2]

20/8 = 2.5

multiply all the ingredients by 2.5

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Which expression shows the quotient of a number n and 4? a.4n b.n-4 c.n÷4 d.n+4

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Step-by-step explanation: The word quotient means division.

So the quotient of a number and 4 means n ÷ 4.

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Solve 2x^3+7x^2-2x-1=o

Mashcka [7]

Answer:

$x=\sqrt{3}-2\\x=-\sqrt{3}-2\\x=\frac{1}{2}$

Step-by-step explanation:

This is a hard one

We have to use the rational root theorem

$2x^3+7x^2-2x-1$ = 0

We have to find all the factors of a and d and put them in a fraction

$a=2\\d=-1\\\frac{1}{1,2}$

We then plug them into the equation to see if any of them work

The equation isn't true when plugging 1, but is true when plugging in 1/2

factored form of 1/2 is (2x-1)

Then we divide the original equation by (2x-1) (you can use synthetic division or long division, it would be hard to type out the process for that) to get $x^2+4x+1$

So now the equation is $(2x-1)(x^2+4x+1)$

Solve the second half of this equation using the quadratic formula to get

$\sqrt{3}-2$ and $-\sqrt{3}-2$

We already know the solution for the first half of the equation (1/2)

So the final answers are:

$x=\sqrt{3}-2, -\sqrt{3}-2, \frac{1}{2}$

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3 years ago