Answer:
12
Step-by-step explanation:
The answer to the above question can be explained as under -
We know that, the sum of angles of triangle is 180°.
So, vertex angle plus base angles are equal are equal to 180°.
Let the vertex angle be represented by "v" and base angles be represented by "b".
Thus, v + b + b = 180°
So, v + 2b = 180°
Next, the question says, the vertex angle is 20° less than the sum of base angles.
Thus, 2b - 20° = v
<u>Thus, we can conclude that the correct option is A) v + 2b = 180°, 2b - 20° = v</u>
Answer:
The remaining area in the form of a polynomial function
where 0 < x < 3.
Step-by-step explanation:
Breadth of rectangular piece of cardboard = 7 inches
Length of rectangular piece of cardboard = 20 inches
Area of cardboard = 
Area of cardboard = 
Area of cardboard =
Squares of length x inches on a side cut from each corner.
Length of square = x
Area of 1 square = 
Area of 4 squares = 
Area of remaining portion 
So, the remaining area in the form of a polynomial function
where 0 < x < 3.
Answer: The last one C=1.38n
Step-by-step explanation: Cost as a function of pounds.