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3 years ago

1.6 + 3 x 4 - 2 divided by 2 An PEMDAS question, pretty easy!

Mathematics

2 answers:

natka813 [3]3 years ago

6 0

Answer:

1.6+3 x 4 -2/2

1.6+12-2/2

1.6+12-1

13.6-1

12.6

hope this helps

have a good day :)

Step-by-step explanation:

uysha [10]3 years ago

3 0

1.6+(3x4)-(2/2)

= 12.6

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Sam needs to make a long-distance call from a pay phone. With his prepaid phone card, he will be charged $1.00 to connect and $0

Mademuasel [1]

Answer: The required system of equations representing the given situation is

$y=1+0.5x\\\\y=3+0.25x$

Step-by-step explanation: Given that Sam needs to make a long-distance call from a pay phone.

We are to write a system to represent the situation.

Let x represent the number of minutes Sam talked on the phone and y represents the total amount that he paid for the call.

According to the given information,

with prepaid phone card, Sam will be charged $1.00 to connect and $0.50 per minute.

So, the equation representing this situation is

$y=1+0.5x~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

Also, if Sam places a collect call with the operator he will be charged $3.00 to connect and $0.25 per minute.

So, the equation representing this situation is

$y=3+0.25x~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)$

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$y=1+0.5x\\\\y=3+0.25x$

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3 years ago

Which of the following is not a solution for x < 8?

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Answer:

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3 years ago

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A telemarketer makes a sale on 25% of his calls. If he makes 300 calls in a night, what is the probability that he will make mor

Nina [5.8K]

Answer: 0.7258

Step-by-step explanation:

Given : A telemarketer makes a sale on 25% of his calls.

i.e. p=0.25

He makes 300 calls in a night, i.e. n=300

Let x be a random variable that represents the number of calls make in night.

To convert the given binomial distribution to normal distribution we have :-

$\mu=np=300(0.25)=75$

$\sigma=\sqrt{p(1-p)n}=\sqrt{(0.25)(1-0.25)(300)}\\\\=\sqrt{56.25}=7.5$

Now, using $z=\dfrac{x-\mu}{\sigma}$ , the z-value corresponds to x= 70 :-

$z=\dfrac{70-75}{7.5}\approx-0.67$

The z-value corresponds to x= 90 :-

$z=\dfrac{90-75}{7.5}\approx2$

By using the standard normal distribution table for z, the probability that he will make more than 70 sales but less than 90 sales:-

$P(-0.67$

Hence, the probability that he will make more than 70 sales but less than 90 sales= 0.7258

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4 years ago

What is r 3/s for r=-6 and s=-2

WITCHER [35]

-27/-2
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3 years ago