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4 years ago

What is the answer to this math problem 40+40x0+1=

Mathematics

1 answer:

pychu [463]4 years ago

3 0

Using pemdas
we multiple 40*0=0
40+0+1
=41

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Joe is 3 times as old as Pepe In how many years will Joe be only twice as old as Pepe ? How old are they now? How old will they

antoniya [11.8K]

Let x = Wally's age now

Then, 3x = Jose's age now

Wally's age 5 years from now = x+5

Jose's age 5 years from now = 3x+5

(x+5) + (3x+5) = 42

4x + 10 = 42

4x = 32 x = 8

Wally is 8 years old and Jose is 24.

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2 years ago

Suppose on a certain test, fifty students earn a perfect score and fifty students earn a zero. determine the mean grade and stan

kodGreya [7K]

Answer:

Mean=50.

standard deviation=50.

Step-by-step explanation:

Let the perfect score be 100.

The mean(average) of a data is given by: $Mean=\frac{sum of data points}{number of data points}$

Here the number of data points are 100. out of which 50 attains a value 100,and 50 attains value 0.

so, sum of data points=50×100+50×0=5000.

$Mean=\frac{5000}{100}$

Mean=50.

"Now the standard deviation of data points are calculated by firstly subtracting mean from every entry and then square the number and take it as new entry and calculate the mean of the new data entry and lastly taking the square root of this new mean".

Here if 50 is subtracted from each entry the new entry will have 50 entries as '50' and 50 entries as '-50'.

next on squaring we will have all the 100 entries as '2500'.

now the mean of these entries is: $\frac{2500\times100}{100}$

=2500

taking it's squareroot we have $\sqrt{2500}=50$

Hence, standard deviation=50.

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4 years ago

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Evaluate the following expression when x = 3 and y = 4:

JulijaS [17]

I don't understand. What are the values given? Are they values of an x,y plot?
If you plot them they are a straight line with y =6x - 2.9 but I don't know what you mean by when x=3 and y = 4?

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4 years ago

which number set(s) does -10 belong toirrational numberswhole numbersrational numbersintegersreal numberscounting or natural num

yKpoI14uk [10]

Given:

The number is -10.

To describe the number:

Explanation:

Since 10 is a whole number and it has a minus sign.

So, -10 is an integer number.

Since it is an integer number.

So, it must be a rational number as well as the real number.

Therefore, -10 is a number that belongs to the sets

Integer numbers

Rational numbers

Real numbers

Final answer:

• Integer numbers

• Rational numbers

• Real numbers

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1 year ago

Let A and B be two events. The probability that event B occurs is 0.72. The probability that events B and A both occur is 0.24.

Sedaia [141]

C is the answer to this question. I hope this helps.

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3 years ago

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