It depends. Everyone have there own preferences . I myself use the completing square method because I can do it fast. But many of my colleagues use quadratic formula. so there is no such thing as which one is easier.
Solve x2−6x−3=0
x2−6x=3
x2−6x+(−3)2=3+9
(x−3)^2=12
take square root on both sides
x−3=±12
x= 3 ±2√3
15+8x=2x+7-5x
Subtract 8x from both sides.
15=2x+7-5x-8x
Combine like terms.
15=-11x+7
Subtract 7 from both sides.
8=-11x
Divide -11 from both sides.
.73=x
Your answer is .72
The GCF is 6.
Prime factors of 42 = 2,3,7Prime factors of 2430 = 2,35,5Common prime factors: 2 ,3Common prime factors with the lowest exponent: 2^1, 3^1
Sales tax = 24/276 x 100 = 8.7%
Sales tax of the second item is 8.7/100 x 218.50 = 0.087 x 218.50 = $19
Answer:
Height = 30 mi.
Base = 120 mi.
Area = 3,600 mi^2.
Step-by-step explanation:
Let the height be x then the base = 4x.
The perimeter = 2*base + 2*height
= 2*4x + 2x
= 10x.
10x = 300
x = 30.
So the height is 30 mi and the base = 4*30 = 120 mi.
The area = height * base
= 30 * 120
= 3600 mi^2.