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3 years ago

How to find square root of 2

Mathematics

1 answer:

Xelga [282]3 years ago

6 0

Answer:

Step-by-step explanation: 1.41421356237

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Solve this problem.<br> ___% of 30 = 12

3241004551 [841]

Answer:

40%

Step-by-step explanation:

a percentage can also be written as something over 100. x/100. to find the percentage you would set up the proportions as 12/30=x/100. then you cross multiply 12x100 and divide by 30. (this is called the bat and ball method). you end up with 40.

7 0

3 years ago

NEED ANSWER ASAP - 100 POINTS

Zina [86]

<h2>Using the quadratic formula</h2>

The quadratic formula can help us solve for x in a quadratic equation:

$x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$

We can use this when the given equation is organized in standard form: $ax^2+bx+c=0$

<h3>Applying this to the problem</h3>

$2x^2+5x-4=0$

First we can identify the values of a, b and c:

a = 2

b = 5

c = -4

Plug these values into the quadratic formula:

$x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$

$x=\dfrac{-5 \pm \sqrt{5^2-4(2)(-4)}}{2(2)}$

$x=\dfrac{-5 \pm \sqrt{25+32}}{4}$

$x=\dfrac{-5 \pm \sqrt{57}}{4}$

<h2>Answer</h2>

Therefore, the two possible values of x are:

$x=\dfrac{-5 +\sqrt{57}}{4}$

$x=\dfrac{-5 -\sqrt{57}}{4}$

3 0

3 years ago

HELP PLEASE I WILL GIVE BRAINLIST

Shalnov [3]

Answer:

Step-by-step explanation:

it’s the only one within Q3

4 0

3 years ago

A data set lists weights (lb) of plastic discarded by households. The highest weight is 5.24 lb, the mean of all of the weight

Vladimir [108]

Answer:

a) 3.308 lb

b) That difference is 2.91 standard deviations.

c) $Z = 2.91$

d) We have that $Z = 2.91 > 2$ , so the weight of 5.24lb is significantly high.

Step-by-step explanation:

The z-score formula is given by:

$Z = \frac{X - \mu}{\sigma}$

In which: X is the weight we are going to find the z-score of, $\mu$ is the mean of all the weights and $\sigma$ is the standard deviation of all the weights.