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iren2701 [21]
3 years ago
12

1) A brick wall has 60 bricks in the bottom row but each row has 3 fewer bricks than the previous one. How

Mathematics
2 answers:
andrew11 [14]3 years ago
8 0

Answer:

24 bricks

Step-by-step explanation:

The equation of the bricks per row can be:

b = 60 - 3r

where r = row and b = bricks.

if r = 12:

b = 60 - 3 * 12\\b = 60 - 36\\b = 24

liubo4ka [24]3 years ago
5 0

There are 27 bricks in the 12th row. Hope this helps ! :)

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License plates are made using 3 letters followed by 2 digits. How many plates can be made if repetition of letters and digits is
Helga [31]

Answer:

26^3\times10^2 = 1757600

option B is correct

Step-by-step explanation:

We have 5 spaces in the license plate:

_ _ _ _ _

we have 26 available letters, and 10 available numbers.

starting with letters:

  • how many choices do i have to place the 1st letter? 26.

26 _ _ _ _

  • how many choices do i have to place the 2nd letter? 26 (since we're allowed to repeat letters)

26 26 _ _ _

  • how many choices do i have to place the 3rd letter? 26

26 26 26 _ _

we've used all the places for letters, (note: the exact position of the letters doesn't matter here, the first letter could've been placed anywhere in _ _ _ _ _, but the amount of possible choices for letters would always be 26).

let's move on to numbers.

  • how many choices do i have to place the 1st number? 10

26 26 26 10 _

  • how many choices do i have to place the 2nd number? 10

26 26 26 10 10

we've completed our number plate. Next we'll simply multiply all these numbers to get all the possible arrangements in which numbers and letters can be displayed on a license place.

26^3\times10^2 = 1757600

option B is correct

8 0
3 years ago
Pls open first to answer correctly get brainlist
KengaRu [80]

Answer:

C AND D

Step-by-step explanation:

it is a rational and real number

5 0
3 years ago
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Write 9/5 as a decimal number.
FrozenT [24]

Answer:

1.8

Step-by-step explanation:

you have to divide 9 from 5 to get 1.8

6 0
2 years ago
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The perimeter of a rectangle is 19 centimeters. Its length is 6 centimeters. What is its width?
Sedaia [141]

Answer:

3.5 cm

Step-by-step explanation:

Perimeter of rectangle = 2 × (w + h)

w = width

h = height

We have: 2 x (w + 6) = 19

w + 6 = 19 : 2 = 9.5

w = 9.5 - 6 = 3.5 (cm)

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What is the volume of this pyramid?
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The Volume of this pyramid is 5040 cm³
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