<span>Discriminant is 28 (c)
First get the equation into the form: Ax^2 + Bx + C = 0 (the quadratic equation)..
By subtracting 10x both sides (to get it on the other side)..
9x^2 + 2 = 10x
9x^2 - 10x + 2 = 10x - 10x
9x^2 - 10x + 2 = 0
Now the discriminant is: b^2 - 4ac
The quadratic equation is Ax^2 + Bx + C = 0
Here, A = 9, B = -10 and C = 2
(-10)^2 - 4 (9)(2)
= 100 - 4 (18)
= 100 - 72
= 28</span>
Answer:
I think it's C, because the figures are similar by THAT statement
Step-by-step explanation:
We have,
Mani is painting rectangular canvas with length of 50 cm, l = 50 cm
He need 160 cm of wood trim to frame the canvas. It means that the perimeter of the frame is 160 cm.
The perimeter of rectangle is given by :
b is width of the canvas
So, the width of the canvas is 30 cm.
Area of rectangular frame is given by :
So, the area of the canvas is 
.
The percent increase is inside parenthesis
1.115 multiplied by 100
111.5% - 100% = 11.5% rate of increase
