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Doss [256]
3 years ago
12

How much metal is needed to cast a cubical metal box with outer side 10 inches long if the thickness of its walls should be exa

ctly 2 inches?

Mathematics
1 answer:
nignag [31]3 years ago
5 0
Notice the picture below

so...  a cube has all sides equal, so is just a rectangular prism with equal sides
and a rectangular prism is just 6 rectangles stacked up to each other at the edges

now, notice in the graph at the bottom, one of the rectangles with a thickness of 2inches

so... just get the volume of each, and add them up, that's how much metal is needed

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8+2(5 - x) = <br> Need help
nikdorinn [45]
We can distribute
2(5)+2(-x)=10-2x

we get
8+10-2x=?
18-2x=?

whatever that ? is, we don't know
multiply both sides by -1
2x-18=-?
add 18 to both sides
2x=18-?
divide bth sides by 2
x=9-(?/2)
whatever the left side  it, just divide it by 2 and subtract it from 9
7 0
3 years ago
Use a=-2, b=-3 and c= 6 to write an expression that has a value of 6
DaniilM [7]

Answer:

Step-by-step explanation:

7 0
3 years ago
PLEASE ANSWER ASAP! 48 POINTS!!
elena-14-01-66 [18.8K]

the first choice has a negative 7 and the second choice has a negative 161 these are both negatives in different places which cause a different reaction

4 0
3 years ago
What is the area of the shape given above?!? Someone please help this is due today
LenaWriter [7]

Answer:

15 m

Step-by-step explanation:

First split the shape into a square and a triangle, then find the area of the square by multipliyng the sides to get.

Next find the length of the traignel by subtracting 3 from 9 to get for then find the area of the triangle by multiplying 4 by 3 to get 12 then divide by 2 to get the area which is 6.  

Finally add the 9 to the 6 to get 15

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7 0
3 years ago
Simplify the expression<br> (4x-6y^(3))^(2)
Andru [333]

Answer:

16x^2 -48xy^3 +36y^6

Step-by-step explanation:

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

FOIL

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

first: 4x*4x = 16x^2

outer : 4x (-6y^3) =-24xy^3

inner :  4x (-6y^3) =-24xy^3

last: -6y^3 * - 6y^3 = 36y^6

Add them together

16x^2 -24xy^3-24xy^3+36y^6

Combine like terms

16x^2 -48xy^3 +36y^6

4 0
3 years ago
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