The tangent line is perpendicular to the radius from the center of the circle to the point of tangency.
ΔDCE is similar to ΔDBA
DC/DB=DE/DA
15/50=DE/40
DE=12
Method One
You could divide by 5 right away.
20/5 = - 3 + x
4 = - 3 + x Add 3 to both sides.
4 + 3 = x
x = 7
Method Two.
You could remove the brackets. This is slightly longer, but some questions can only be solved that way.
20 = 5(-3) + 5x
20 = -15 + 5x Add 15 to both sides
20 + 15 = 5x
35 = 5x Divide by 5
35/5 = x
7 = x
4bags / 6kg = 1bag in kilograms
1kilogram=1000 grams
Answer:
of sheet steel are needed
Step-by-step explanation:
Given
The missing dimensions are:
--- number of containers
Required
The surface area of all containers
First, we calculate the surface area (A) of 1 container
The surface area of 10 is:
