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MakcuM [25]
2 years ago
9

A brick measures 15 cm in length, 8 cm in breadth and 5 cm in height. How many bricks will be used to make a wall of length 15 c

m, breadth 10 cm and height 8 cm
1. 2 bricks
2. 5 bricks
3. 9bricks
4. 4bricks
Mathematics
1 answer:
il63 [147K]2 years ago
3 0

Answer:

2bricks

Step-by-step explanation:

volume of cuboid = length × breadth ×height

step 1 : calculate the first one

v= 15cm ×8cm× 5cm = 1200cm^3

step 2 calculate the 2nd one

v= 15cm ×10cm×8cm = 600cm^3

number of bricks

1200cm^3 × 1bricks/ 600cm^3 = 2 bricks

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If f (1) = 7 and f (n) = 4 f (n - 1) then find the value of f (5)
Elina [12.6K]

Answer:

1792

Step-by-step explanation:

given,

f (n) = 4 f (n - 1)

here,

f(2) = 4 f ( 2-1)

= 4 f ( 1 )

= 4. 7

= 28

then,

f(3) = 4 f ( 3-1)

= 4 f ( 2)

= 4. 28

= 112

again,

f (4) = 4 f ( 4-1)

= 4 f ( 3)

= 4.112

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at last,

f ( 5) = 4 f ( 5-1)

= 4 f ( 4)

= 4. 448

= 1792

7 0
3 years ago
Is (6, –2) a solution to this system of equations? y = –1/6 x − 1 y = 1/6 x − 3
Liula [17]

Answer:

Yes, (6, -2) is a solution to the given system of equations.

Step-by-step explanation:

Please write  y = –1/6 x − 1 y = 1/6 x − 3 as follows, for greater clarity:

y = (–1/6)x − 1

y = (1/6)x − 3

Let's actually solve this system:

y = (–1/6)x − 1

y = (1/6)x − 3

-----------------------

2y = -4, or y = -2

Now find x.  Arbitrarily we choose to use the first equation for this purpose:

y = (-1/6)x - 1.  We set y = -2 and find x:    -2 = (-1/6)x - 1

Combining the constants, we get -1 = (-1/6)x, or 6 = x

Yes, (6, -2) is a solution to the given system of equations.

5 0
3 years ago
Wally buys nine books that coast $19.50 apiece. How much does Wally spend?
umka21 [38]
Hi there!

To solve this problem, we need to multiply the cost of each book by the amount of books Wally bought.

$19.50 × 9 = $175.50

So, the total amount payed was $175.50.

Hope this helps!
3 0
2 years ago
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