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Lubov Fominskaja [6]
3 years ago
8

Byron bought a keyless entry door lock that has the digits 0 through 9 on the keypad. He wants to choose a three-digit entry cod

e. How many different combinations are possible, if the digits can be repeated?
27307291,000
Mathematics
1 answer:
malfutka [58]3 years ago
7 0
There are, 3 x 2 x 1 = 6 possible ways of arranging the three digits. Therefore in that set of 720 possibilities, each unique combination of three digits is represented 6 times. So there are 720 possible combinations.

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Transform the equation y-2=3(x+1) into standard form.
Anna35 [415]

ANSWER:

The 1st one: -3x + y = 5

ABOUT STANDARD FORM:

  • Ax + By = C
  • A & B & C are integers
  • A & B are both non - zero
  • This form is good to use when wanting to find the x & y intercepts of a line

y - 2 = 3(x + 1)  --- IN POINT SLOPE FORM

y - 2 = 3x + 3

 + 2         + 2

y = 3x + 5 --- IN SLOPE INTERCEPT FORM

-3x  -3x

-3x + y = 5  --- STANDARD FORM


Hope this helps you!!! :)



5 0
3 years ago
in a farm 6084 trees aer planted in such a way that there are as many trees in a row as there are row. how many rows are there?​
Leno4ka [110]

Answer:

78 trees

Step-by-step explanation:

No. of trees planted = Area of square

No. of trees planted = 6084

Row = side of square

Side = √(Area)

Side = √(6084)

Side = 78 trees

7 0
3 years ago
PLz answer i really dont know math plz tell me the correct answer
Gwar [14]

Answer:

a

Step-by-step explanation:

With the equation I did 8 * -3/4 + 8 because and I did that with the rest but the only table that is correct using the equation is table a. Hope this helps! :)

4 0
2 years ago
How would i answer this?​
Lelu [443]

9514 1404 393

Answer:

  y = (x -1)² -16

Step-by-step explanation:

Note the location of the vertex (point A) on the graph. Its x-coordinate is readily identifiable as 1. Its y-coordinate is some value between -15 and -20, closer to -15. (If you go to the trouble of finding the vertex coordinates, you discover they are (1, -16).)

Once you have determined what the vertex is, you can compare the offered answer choices to the vertex form ...

  y = (x -h)² +k

where (h, k) are the vertex coordinates. That is, you are looking for an answer choice that is something like ...

  y = (x -1)² -16

3 0
3 years ago
The area of a rectangular piece of cardboard is represented by
Liula [17]

This question is solved applying the formula of the area of the rectangle, and finding it's width. To do this, we solve a quadratic equation, and we get that the cardboard has a width of 1.5 feet.

Area of a rectangle:

The area of rectangle of length l and width w is given by:

A = wl

w(2w + 3) = 9

From this, we get that:

l = 2w + 3, A = 9

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

ax^{2} + bx + c, a\neq0.

This polynomial has roots x_{1}, x_{2} such that ax^{2} + bx + c = a(x - x_{1})*(x - x_{2}), given by the following formulas:

x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}

x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}

\Delta = b^{2} - 4ac

In this question:

w(2w+3) = 9

2w^2 + 3w - 9 = 0

Thus a quadratic equation with a = 2, b = 3, c = -9

Then

\Delta = 3^2 - 4(2)(-9) = 81

w_{1} = \frac{-3 + \sqrt{81}}{2*2} = 1.5

w_{2} = \frac{-3 - \sqrt{81}}{2*2} = -3

Width is a positive measure, thus, the width of the cardboard is of 1.5 feet.

Another similar problem can be found at brainly.com/question/16995958

5 0
3 years ago
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