<h2>
Answer:</h2>
The dollar cost of the flour required to make 1 cake is:
$ w/(xy)
<h2>
Step-by-step explanation:</h2>
It is given that:
- It takes 1 pound of flour to make y cakes.
This means that in order to make 1 cake the amount of flour required is: 1/y pound.
- The price of flour is w dollars for x pounds.
Cost of x pounds= $ w
Cost of 1 pound= $ w/x
Cost of 1/y pound= $ w/(xy)
i.e.
Cost of making 1 cake= $ w/(xy)
<u>Part 1</u>
The gradient of the line is , so the equation is .
This means the system is
<u>Part 2</u>
Substituting in the coordinates (-3,11) and (2,1) into the equation of the parabola,
Subtracting the equations, we get 10=5a, and thus a = 2
Substituting a = 2 back into the system, we get b = -7
<u>Part 3</u>
The equation of the parabola is , and the turning point is at . Therefore, the value of y is -7
M + 3= 9m -13
m -9m = -13-3
-8m =-16
8m=16
m = 16/8 = 2
Answer:
A = 120
Step-by-step explanation:
Angle A is a vertical angle to 120 and vertical angles are equal
A = 120