<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:
V = 8491 mm^3
Step-by-step explanation:
The volume of a cylinder is given by
V = pi r^2 h
We know the radius is 13 and the height is 16
V = pi * (13)^2 *16
V = 169*16 *pi
V =2704 *pi
Let pi be approximated by 3.14
V =2704(3.14)
V =8490.56
To the nearest whole number
V = 8491 mm^3
12,13 17 18 19 20 21 22 25 28 30 35
18-1.8x= ?
x = 7
So, substitute the number in for the x
18-1.8*7
18-12.6=5.4
5.4 is your answer
-IronWolfX✔
