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2 years ago

13

A school assigns each student an identification number. the number consists of 3 digits out of 10 possible digits, and no digits

are repeated. how many different identification numbers are possible

1 answer:

tankabanditka [31]2 years ago

8 0

10-3 = 7 hopefully this helps

You might be interested in

Which expression could be substituted for y in the second equation to find the value of x?

EastWind [94]

value of x is $x=-\frac{29}{4}$ and value of y is $y=-\frac{9}{2}$

Step-by-step explanation:

We need to find Which expression could be substituted for y in the second equation to find the value of x

The given equations are:

$2x-y=-10\,\,\,(1)2x - 3y= -1\,\,\,\,(2)$

For putting value of y in second equation, we will find from equation 1

From equation 1:

$2x-y=-10\\-y=-10-2x\\y=10+2x$

Putting value of y i.e y=10+2x in equation (2) to find value of x

$2x-3y=-1\\2x-3(10+2x)=-1\\2x-30-6x=-1\\-4x=-1+30\\-4x=29\\x=\frac{29}{-4}\\x=-\frac{29}{4}$

So, now finding value of y by putting value of x= -29/4 in eq(1)

$2x-y=-10\\2(-\frac{29}{4})-y=-10\\-\frac{29}{2}-y=-10\\-y=-10+\frac{29}{2}\\ -y=\frac{-20+29}{2}\\ -y=\frac{9}{2}\\ y=-\frac{9}{2}$

So, value of x is $x=-\frac{29}{4}$ and value of y is $y=-\frac{9}{2}$

Keywords: System of equations

Learn more about System of equations at:

#learnwithBrainly

6 0

3 years ago

The local coffee shop offers a 10 percent discount to senior citizens on a cup of coffee and a donut. If the regular price is $2

LenKa [72]

2.95 * 10%=
2.95 * .1 =
.295
Subtract .295 from 2.95
2.95 - .295 = 2.655
$ 2.66

8 0

2 years ago

Read 2 more answers

Picture 1 : Is the volume of this 18ml.

sattari [20]

I can't tell what the numbers are on the first one but you got the second one right, and the last one would be different it would be 24 I believe.

6 0

3 years ago

I need to solve the whole thing

kipiarov [429]

1.) 40, 2.) 8, 3.) 18, 4.) 15, 8.) 12, 9.) 30, 10.) 72, 11.) 36

4 0

3 years ago

I’m not sure ???????????

ad-work [718]

The picture is omitting the question

4 0

2 years ago