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11Alexandr11 [23.1K]
3 years ago
12

To use your debit card at a pay-at-the-pump system, you have to enter a four-digit personal identification number (PIN). How man

y different possible PINs can be formed on the 10-digit keypad? (Repetition is not allowed.)
Mathematics
1 answer:
nydimaria [60]3 years ago
5 0
Answer is 5040
10×9×8×7=5040
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Solve the system of equations by elimination.<br> 2x - y + 3z=-1<br> x + 2y - 4z=-1<br> y – 2z=0
MrRa [10]

Answer:

x = -1, y = 2 and z = 1

Step-by-step explanation:

The given system of equations are :

2x - y + 3z= -1  ....(1)

x + 2y - 4z = -1  ......(2)

y – 2z = 0  .....(3)

Equation (3) can be written as :

y = 2z

Use y = 2z in equation (2)

x + 2(2z) - 4z = -1

x + 4z - 4z = -1

x = -1

Put the value of x in equation (1) :

-2 -y +3z = -1

-y+3z = 1 ....(4)

Adding equation (3) and (4)

y-2z+(-y+3z)=1

z = 1

Now put z = 1 in equation (4)

-y+3=1

-y = -2

y = 2

Hence, the values of x,y and z are -1, 2 and 1 respectively.

6 0
3 years ago
4 + 5x = 3 (-x + 3) -11
Salsk061 [2.6K]

Answer:

4 + 5x = 3 (-x + 3) -11

4+5x=-3x+9-11

5x+3x=9-11-4

8x= -6

x= -0.75

8 0
3 years ago
Determine the intersepts of the lines ​
Goryan [66]

Answer:

Y-intercept is (0, 100) and the X-intercept is (-250, 0)

Step-by-step explanation:

For the y-intercept the line from the origin does not move left or right and stays at 0 but it goes up by 100.

For the x-intercept the line does not go up and down but it goes to the left -250.

7 0
2 years ago
(8 x 104) (4.5x 10-1) =
Rashid [163]

\tt{}(8 \times 104)(4.5 \times 10 - 1)

\tt{}(832)(45 - 1)

\tt{}(832)(44)

\tt{}832 \times 44

\tt{}36608

3 0
3 years ago
Please help will give brainliest to first correct answer
klio [65]

Answer:

A (i think)

Step-by-step explanation:

A tiling or tessellation of a flat surface is the covering of a plane using one or more geometric shapes, called tiles, with no overlaps and no gaps. In mathematics, tessellations can be generalized to higher dimensions and a variety of geometries. A periodic tiling has a repeating pattern.

5 0
3 years ago
Read 2 more answers
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