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2 years ago

I think of a number, multiply it by 3, add 4 and square the answer

Mathematics

2 answers:

netineya [11]2 years ago

7 0

Step-by-step explanation:

I can read your mind you know

just ask me how

and see the magic

think of any number,

add it by 3 then by 5 then by 1.

multiply it by two

divide it by two

subtract the first number you thought of from your current number

your answer will be 9

I'm I correct ?

WINSTONCH [101]2 years ago

5 0

Answer:

2 x 3 = 6 + 4 = 10 squared = 100

Step-by-step explanation:

The square of a number is the number that can be multiplied by itself to get that specific number, for example 10 x 10 = 100

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Final exam scores are normally distributed with a mean of 74 and a standard deviation of 6. Approximately, what percentage of fi

notka56 [123]

Answer:

81.86%

Step-by-step explanation:

We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.

First of all we will find z-score using z-score formula.

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

$z=\frac{68-74}{6}$

$z=\frac{-6}{6}=-1$

Now let us find z-score for 86.

$z=\frac{86-74}{6}$

$z=\frac{12}{6}=2$

Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.

Using normal distribution table we will get,

$P(-1$

$P(2>Z)=.97725$

We will use formula $P(a$ to find the probability to find that a normal variable lies between two values.

Upon substituting our given values in above formula we will get,

$P(-1$

Upon converting 0.81859 to percentage we will get

$0.81859*100=81.859\approx 81.86$

Therefore, 81.86% of final exam score will be between 68 and 86.

3 0

3 years ago

A pound of rice crackers cost $2.88. Matthew purchased 1/4 pound of crackers. how much did he pay for the crackers?

sammy [17]

2.88 times 1/4 = $0.72

7 0

3 years ago

Read 2 more answers

Corey finds a leaf that is 5 cm long. Which measurement is equivalent to 5 cm

Likurg_2 [28]

Hey there!

5 centimeters (aka cm) is equivalent to 50 millimeters (aka mm)

5cm = 50mm

Hope this helps you!

God bless ❤️

xXxGolferGirlxXx

6 0

3 years ago

The blue doy is at what value on the number line?

crimeas [40]

Answer:

Step-by-step explanation:

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3 years ago

A rectangle has a perimeter of 48 feet and a length of 14 feet. Which equation can you solve to find the width?

Orlov [11]

Answer:

48=14+2w

An equation for this with no values would be 2w+2l=p

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

I think of a number, multiply it by 3, add 4 and square the answer​

I think of a number, multiply it by 3, add 4 and square the answer