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EleoNora [17]
3 years ago
14

A solid aluminum cube has sides each of length l . A second cube of the same material has sides four times the length of the fir

st cube, i.E., 4 l . What is the weight of the second cube
Mathematics
1 answer:
timofeeve [1]3 years ago
3 0
The formula to find the volume of cube

cube = s^3

Therefore volume is equal to I^3

The second cube has 4x the First cube

4 × (I^3) = 4 ×I^3

Total volume of the second cube= 4I^3 cm3

Fact: the density(mass ÷ volume) of aluminium is 2.40g/cm3

Making mass the subject of the formula:

D = M ÷ V
(Times volume to remove deno minator)

Mass = Density × Volume

Mass = 2.40 × 4I ^3

Mass = 8.40I^3

By physics

weight= m × g

where
M = mass
g = acceleration due to gravity (= 9.8)

W = 8.40 I^3 × 9.8

Weight of aluminium = 82.32I^3
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Answer:

9x^4+21x+6=0

Step-by-step explanation:

( 3x^2)^2+7(3x +2) -8=0

((3^2)*(x^2)^2)+(7*3x)+(7*2)-8=0

9(x^4)+21x+14-8=0

9x^4+21x+6=0

7 0
3 years ago
(15pts) factor each completly
Natali [406]
Your answers:

10) (m+7)(m+8) 11) (b-10)(b+2)

12) (k-4)(k+10) 13) (n-9)(n-8)

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Hope it helps
5 0
3 years ago
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4(2x - 5) + 15 = 11 Write the steps you will use to solve the equation and explain each step.
vagabundo [1.1K]
First, multiply 4*2x-4*-5= 8x-20.
Second, add 15 to 8x-20
Third, that would equal 8x-20+15=11 
Fourth, 15+-20= -5 
Fifth, 8x-5=11
Sixth, add +5 to -5 and +5 to 11= 8x=16 
Last, do 8x/8x and 16/8x 
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6 0
3 years ago
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I NEED HELP
kogti [31]

                       -6  =  y/5 + 4

Step 1:  Subtract  4  from each side of the equation.

Step 2:  Multiply each side by  5.

If you don't arrive at the solution  y= -50 , then return to Step-1
and repeat the process, being on the lookout for your mistake.


4 0
3 years ago
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Could you please answer this question?
Juli2301 [7.4K]

Answer:

.

Step-by-step explanation:

3x - y = 17 .......A

10 × [x/5 + y/2] = 10 × 0

2x + 5y = 0 .......B

......A× 5 both 2 sides of equation

15x - 5y = 85 .....C

......B + ........C

2x + 15x = 0 + 85

17x = 85

x = 85/17

x = 5

put x value in ........A or .......B or ......C

you will receive y = -2

5 0
3 years ago
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