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3 years ago

Two-digit natural numbers are formed, with replacement, from the digits 0 through 9.

Mathematics

2 answers:

alexdok [17]3 years ago

7 0

Answer:

The first digit of a two digit number can be any of digits 1 - 9. It cannot be 0 though. Therefore there are 9 possible digits for the first place.

There are 5 possible digits for the second position. The two digit number has to be odd and therefore the final digit must be 1,3,5,7 or 9

Therefore for each and every one of the nine first digits there are 5 digits that the second can be.

Therefore ANSWER = 9 * 5 = 45 possible permutations.

2. The largest two digit number = 99

Subtract 57 and you get 42

ANSWER = 42

The forty two numbers are 58 ,59, 60, 61......98, 99

Karolina [17]3 years ago

7 0

Answer:

50 two-digit odd numbers are formed

Step-by-step explanation:

From the digits from 0 to 9 to get two -digit odd numbers you will need to pair numbers from

0 to 9 as the first digit of the numbers = 10 possible numbers

and also you will need to pair the first digits with an odd number as the second digit .

to get the odd numbers as second digits you will need to pick from

1 , 3 , 5 ,7 and 9 = 5 possible numbers.

zero is considered in the first digit because zero can start a two digit natural number and zero is not considered in the second digit because zero is an even number.

to get the possible two -digit number you will have to multiple the possible numbers for the first digits with the possible numbers for the second digits which is =

10 * 5 = 50 hence there will be 50 possible two-digit odd numbers.

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| -4 + 5\2 | - (-x) =-3

Leto [7]

Answer:

x = -4.5

Step-by-step explanation:

Solving the equation :

$\left\vert -4+\frac{5}{2} \right\vert -\left( -x\right) =-3$

$\Longleftrightarrow \left\vert \frac{-8}{2} +\frac{5}{2} \right\vert +x =-3$

$\Longleftrightarrow \left\vert \frac{-8+5}{2} \right\vert +x =-3$

$\Longleftrightarrow \left\vert \frac{-3}{2} \right\vert +x =-3$

$\Longleftrightarrow \frac{3}{2} +x =-3$

$\Longleftrightarrow x =-3-\frac{3}{2}$

$\Longleftrightarrow x =-\frac{6}{2} -\frac{3}{2}$

$\Longleftrightarrow x = -(\frac{6}{2} +\frac{3}{2} )$

$\Longleftrightarrow x =-\frac{9}{2}$

$\Longleftrightarrow x =-4.5$

7 0

3 years ago

Question#1 will give brainliest

Travka [436]

Step-by-step explanation:

y = 16x²

you put the x values one after the other in place of x and do the calculations.

x = -4

y = 16×(-4)² = 16×16 = 256

x = -3

y = 16×(-3)² = 16×9 = 144

x = -2.5

y = 16×(-2.5)² = 16×6.25 = 100

x = -2

y = 16×(-2)² = 16×4 = 64

x = -1.5

y = 16×(-1.5)² = 16×2.25 = 36

x = -1

y = 16×(-1)² = 16×1 = 16

x = -0.5

y = 16×(-0.5)² = 16×0.25 = 4

x = 0

y = 16×0² = 16×0 = 0

x = 0.5

y = 16×0.5² = 16×0.25 = 4

x = 1

y = 16×1² = 16×1 = 16

and so on.

36, 64, 100, 144, 256

as you can see, the y values are the same for the positive and the negative values.

because squaring a negative number is the same as squaring the same positive number. that is, because (if you remember) squaring something means to multiply that something with itself. and minus multiplied by minus is plus, as plus multiplied by plus is plus.

and that creates the symmetry around the y-axis or x = 0. everything left of the y-axis is mirrored on the right side of the y-axis (and vice versa).

5 0

2 years ago

The expression 2x + 50 represents the elevation above sea level, in meters, of a rock climber after x minutes of climbing.

Archy [21]

The expression 2x + 50 represents the elevation above sea level of the climber. It can be written as a function as follows:

f(x) = 2x + 50 where f(x) is the height and x is time.

We can obtain the initial height when we set time 0 in which the climber has not started climbing yet. Therefore, the initial height of the climber would be 50 meters above sea level.

8 0

4 years ago

Read 2 more answers

Roberta Arthur had the following reciepts for the week of April 12th: 50$ gift; 25$ rebate; April 13th, 2.45$ refund on aluminum

oksian1 [2.3K]

Answer:

$329.44

Step-by-step explanation:

$50-25= 25

25.00-2.45=22.55

299.89+22.55=322.44

322.44+7.00= 329.44

I didnt see april 15 if its supposed to be added i there just add 299.89 to the total.

7 0

3 years ago

When money is spent on goods and services, those who receive the money also spend some of it. The people receiving some of the t

Bad White [126]

Solution :

If $S_n$ is the total spending generated after n transactions, then $a_n$ is the spending generated during the n-th transaction. Since the government spends D dollars, then $a_1$ = D.

Then the second person will receive D dollars and spend $D_c$ dollars. Therefore, $a_2=D_c$ . The next person will receive $D_c$ dollars, which means they are spending $a_3 = (D_c)c = Dc^2$ dollars. Therefore,