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katrin [286]
2 years ago
6

Find the least number of cuboids of sides 20 cm 15 cm and 9cm required to make a perfect cube​

Mathematics
1 answer:
NikAS [45]2 years ago
4 0

Answer:

<em>No. of cuboids required to form a cube = 2*2*5 = 20 Therefore, 20 cuboids will be required to form a cube.</em>

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2) A gym charges a $30 membership fee and $10 per month. Write an
kari74 [83]

C = 10m + 30, where C is total cost and m is # of months

C = 10(5) + 30

C = 50 + 30

C = $80

$160 = 10m + 30

160 - 30 = 10m

130/10 = m

m = 13 months

Hope that helps

5 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 confused. Can someone help me out with this problem step-by-step using the P = 2L + 2W formula?
german

We can't use P = 2L + 2W because  the sides have different lengths.

P = a + b + c + d

a = x

b = 2x

c = 2x - 2

d = x + 5

P = x + 2x + (2x - 2) + (x + 5)

P = <u>x + 2x + 2x</u> - 2 <u>+ x</u> + 5

P = 6x + 3

if x = 4:

P = 6 · 4 + 3

P = 24 + 3

P = 27

3 0
3 years ago
A company is constructing an​ open-top, square-based, rectangular metal tank that will have a volume of 49 cubic feet. What dime
yawa3891 [41]

Answer:

b = 4.6 ft

h = 2.3 ft

Step-by-step explanation:

The volume of the tank is given by:

b^2*h=49

Where 'b' is the length of the each side of the square base, and 'h' is the height of the tank.

The surface area can be written as:

A=b^2+4bh\\A=b^2+4b*({\frac{49}{b^2}})\\A=b^2+\frac{196}{b}

The value of b for which the derivate of the expression above is zero is the value that yields the minimum surface area:

\frac{dA}{db} =0=2b-\frac{196}{b^2}\\2b^3=196\\b=4.61\ ft

The value of h is then:

h=\frac{49}{4.61^2}\\h=2.31\ ft

Rounded to the nearest tenth, the dimensions are b = 4.6 ft and h = 2.3 ft.

7 0
3 years ago
Factor this expression
Julli [10]

Answer:

6(6x^2-4x-3)

Step-by-step explanation:

pull out the gcf which is 6 and it is complete because it is impossible to factor 6x^2-4x-3

5 0
2 years ago
Read 2 more answers
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