Answer:
Option B is correct.
the value of discriminant is, -7
Step-by-step explanation:
Given the equation:
To find the value of discriminant
A quadratic equation is of the form where a, b and c are coefficient of the equation.
On comparing with given equation we have;
a = 1 , b = 1 and c = 2
then;
Discriminant =
Therefore, the value of discriminant is, -7
Answer: 79
Step-by-step explanation:
Answer:
Step-by-step explanation:
ΔADC and ΔDBC are similar (AAA)
Therefore the cooresponging sides are in proportion:
Substitute:
<em>cross multiply</em>
Answer:
20 cm
Step-by-step explanation:
Given that :
P = 1/25 r²h
P = price = 240 ; h = height = 15cm
Inputting values into the equation :
240 = 1/25 * r² * 15
25 * 240 = 15r²
6000 = 15r²
6000 / 15 = r²
400 = r²
Square root of both sides
20 = r
Radius = 20cm