4 years ago

How do you get 21/2?

Mathematics

1 answer:

denis23 [38]4 years ago

8 0

Answer:

10 1/2

Step-by-step explanation:

/ = divide

21 divided by 2 is 10 remainder 1 ~ 10 1/2 as a mixed number

21/2 as a improper fraction

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The manager of a supermarket wants to obtain information about the proportion of customers who dislike a new policy on cashing c

alex41 [277]

Answer:

n = 61 costumers

Step-by-step explanation:

For calculating the number of costumers he should sample we use the next equation:

$n = \frac{z_{1-\alpha/2}^{2}p(1-p)}{E^{2} }$

Where E is the error that we are prepared to accept, in this case E = 0.15

How we don't know the value of p, we can estimate it like p = 0.5

∝ = 1-0.98 = 0.02

1-∝/2 = 0.99

$z_{0.99} = 2.33$

$n = \frac{(2.33^{2})(0.5)(1-0.5)}{0.15^{2} }$

n = 60.32 costumers

n ≈ 61 costumers

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4 years ago

Using the quadratic formula to solve x2 = 5 – X, what are the values of x? -1 + 21 2 -12/19/ 2 5+21 2 1+ 191 2

inna [77]

Answer:

${x}^{2} = 5 - x \\ { \tt{ {x}^{2} + x - 5 = 0 }} \\ \\ { \bf{x = \frac{ - b± \sqrt{ {b}^{2} - 4ac } }{2a} }} \\ \\ { \tt{x = \frac{ - 1± \sqrt{21} }{2} }} \\$

3 0

3 years ago

There are 120 people on the bus 50% get off at the first stop 20% get off at the second stop. The rest get off on the third stop

padilas [110]

Answer:

Step-by-step explanation:

so 50% of 120 is just half of it. so that would be 60. Then 20% of 120 is 24 so subtract that from 60 and you get 36.

5 0

3 years ago

What is the value of x?<br> -5x – 2 = -13

Phantasy [73]

Answer:

2.20

Step-by-step explanation:

So add +2 both sides that cancels 2 and that makes it -11.00 now divide it by -5 and x is by itself

So when you divide it x=2.20

Hope that helps

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3 years ago

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Ostrovityanka [42]

They go up down up ya up down u know

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3 years ago