8 + 4 = 3x
12 = 3x
divide both sides by 3
x= 4
Answer:
4z²
Step-by-step explanation:
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Answer:
The approximate volume of the tube is 1,005 cm³
Step-by-step explanation:
To find the volume of the tube, we will follow the steps below:
First, write the formula for calculating the volume of a cylinder
volume of a cylinder = πr²h
where r is the radius and h is the height of the cylindrical cardboard tube
from the question given, height is equal to 20 centimeters and diameter = 8 centimeters but diameter = 2r, this implies that r = d/2 hence radius r =8/2 = 4 centimeters
π is a constant and is ≈ 3.14
we can now proceed to insert the values into the formula
volume of a cylinder = πr²h
≈ 3.14 × 4²× 20
=3.14 × 16× 20
≈1,005 cm³ to the nearest whole cubic centimeter.
The approximate volume of the tube is 1,005 cm³
Volume of the prism is the area of the triangle x the height.
To find the height find the area of the triAngle first, then divide the volume by the area.
Area = 1/2x 7x18 = 63 square mm
X = 1638/63
X = 26 mm
Power rule
y^3(2)
y^6y^7
product rule, add them
y^13
