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Sergio [31]
3 years ago
13

(-4) (9) ----------- (-6)

Mathematics
1 answer:
valkas [14]3 years ago
8 0
6 or -36/-6 if it works
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A cube with 2 inch sides is placed on a cube with 3 inch sides. Then a cube with 1 inch sides is placed on the 2 inch cube. What
Taya2010 [7]

Answer:

let's try the "Divide and Conquer" method, that is we break down the problem into pieces and solve each piece until we arrive at the answer.

the formula for the surface area of the cube is:

SA = 6s^2; s is the length of one side of the cube

for the 3-inch cube

SA = 6(3^2)

SA = 6(9)

SA = 54 in^2

note however, that the actual surface area is less the area occupied by the 2-inch cube place on the 3-inch cube, which is

A = s^2; since this is a square

A = 2^2

A = 4 in^2

the actual SA (aSA) therefore of the 3-inch cube is

aSA = 54 - 4 = 50 in^2

for the 2-inch cube

SA = 6s^2

SA = 6(2^2)

SA = 6(4)

SA = 24 in^2

to solve for the actual SA of the 2-inch cube, we subtract the area which is in contact with the 3-inch cube and the 1-inch cube

aSA = 24 - 2^2 - 1^2

aSA = 24 - 4 - 1

aSA = 19 in^2

for the 1-inch cube

SA = 6s^2

SA = 6(1^2)

SA = 6 in^2

the actual surface area is less the area in contact with the 2-inch cube

aSA = 6 - 1^2

aSA = 5 in^2

the surface area of the three cube tower will just be the sum of the aSA of the three cubes

SA = 50 + 19 + 5

SA = 74 in^2   ans

Step-by-step explanation:

5 0
3 years ago
Using the graph, estimate the cost of 100 kilowatts-hours of electricity
Dimas [21]

Answer: A - About $8

Step-by-step explanation:

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3 years ago
Find the measure of x, then the measure of А<br> (33-9x)"<br> 48/Dc<br> x =<br> degrees<br><br><br> I need it now please!!!
erastova [34]

Answer:

<em>x = - 11 ; m∠B = 132° </em>

Step-by-step explanation:

(33 - 9x)° + 48° = 180°

33 - 9x + 48 = 180

81 - 9x = 180

- 9x = 99

<em>x = - 11</em>

m∠B = [33 - 9(- 11)]° = (33 + 99)° = 132°

<em>m∠B = 132°</em>

8 0
3 years ago
In need to know what is the solution of the equation 101.4 - d = 99.2
Grace [21]
The solution is d = 2.2
6 0
3 years ago
Read 2 more answers
How to write 0.0000000000372 in scientific notation?
lutik1710 [3]
3.72 x 10^-11
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