3 years ago

X/2 - 1 < 5 | x = ? help please

Mathematics

1 answer:

aliina [53]3 years ago

4 0

Answer:

x<12

Step-by-step explanation:

x/2 - 1 <5

x/2 < 6

x < 12

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1 fourth which as a fraction would look like:

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Answer:

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2 years ago

9 ? x 5 hours = 45 person-hours

Yuri [45]

Answer:

person

Step-by-step explanation:

9 person × 5 hours

= 45 person-hours

Sorry if there any mistakes

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3 years ago

Many people consider their smart phone to be essential! Communication, news, Internet, entertainment, photos, and just keeping c

g100num [7]

Answer:

a) 0.4567

b) 6 hours

Step-by-step explanation:

We are given the following information the question:

The battery life follows a normal distribution with

$\mu = 9.75\\\sigma = 2.3$

Formula:

$z = \displaystyle\frac{x-\mu}{\sigma}$

a) We have to find probability such that battery life exceeds 10 hours, that is,

P(X>10)

$P(z > \displaystyle\frac{10 - 9.75}{2.3}) = P(z>0.1086)\\\\= 1 - P(z \leq 0.1086)\\= 1- 0.5433\\=0.4567$

b) We have to find battery life such that

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Here, we calculated the value of z from the normal distribution table.

So, after approximately 6 hours one should plan to recharge the phone.

7 0

3 years ago