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kramer
3 years ago
8

Minimize embedded content

Mathematics
1 answer:
rjkz [21]3 years ago
5 0

Answer:

84 cm²

Step-by-step explanation:

Surface area of the polyhedron = the sum of the areas of each parts of the net = area of 2 triangles + area of each of the 3 rectangles

Area of 2 triangles:

Base = 4 cm

Height = 3 cm

Area of the 2 triangles = 2(½*base*height)

= 2(½*4*3) = 4*3 = 12 cm²

Area of rectangle with the following dimensions:

Length = 6 cm

Width = 4 cm

Area = length * width = 24 cm²

Area of rectangle with the following dimensions:

Length = 6 cm

Width = 5 cm

Area = length * width = 30 cm²

Area of rectangle with the following dimensions:

Length = 6 cm

Width = 3 cm

Area = length * width = 18 cm²

Surface area of the polyhedron = 12 + 24 + 30 + 18 = 84 cm²

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pav-90 [236]
Get y in terms of x then substitute the expression into the other equation.

#7.
y - 2x = -6
y = 2x -6
y gets substituted for 2x - 6
5x - (2x - 6) = 9
5x - 2x + 6 = 9
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use this to find the other one
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#8.
3y + x = 2
x = 2 - 3y
substitute x for 2 - 3y in the second equation
y - (2 - 3y) = -6
y - 2 + 3y = -6
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use this to find the other one
-1 - x = -6
-x = 1 - 6
-x = -5
x = 5
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3 years ago
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Lapatulllka [165]

Answer:

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3 years ago
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Step-by-step explanation:

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3 years ago
theo had a balance of -$4 in his savings account. After making a deposit, he has $25 in his account. What is the overall change
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2)
suter [353]

Answer:

A

Step-by-step explanation:

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2 years ago
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