Answer:

Step-by-step explanation:
(1) To solve by factoring,
Given equation: 
Subtract 9 from both sides of the equation.

Using zero factor principle, 
The solutions are
.
(2) To solve by complete the square
,
Given 
Divide both sides of the equation by 4.
Square root on both sides.

(3) To solve by quadratic formula,

Here, a = 4, b = 0, c = –9
Quadratic formula, 


Answer:
15 feet
Step-by-step explanation:
This is already factored for the zeros of the quadratic. If x - 5 = 0 and x - 20 = 0 then x = 5 and 20. The ball was kicked 5 feet out and landed at 20 feet down the field. The difference is 15 feet. That's how far the ball traveled from its initial position on the ground to its landing place.
So 15 feet from where it was kicked.
1 fifth of ten is 2 where as 5×10 =50
Answer:
60
Step-by-step explanation:
LCM of 12 and 15
<em><u>First Method: Listing the multiples</u></em>
First, write the common multiples of all three numbers.
Common Multiples of 12: 12,24,36,48,60,72,….
Common Multiples of 15: 15, 30, 45, 60, 75,…
Hence, the Least common multiple of 12 and 15 is 60.
<em><u>Second method: By prime factorisation</u></em>
Let us write the prime factors of the two numbers individually.
12 = 2 x 2 x 3
15= 3 x 5
Multiply each factor the maximum number of times it occurs in either number
= 2 X 2 X 3 X 5
= 60
LCM of 12 and 15= 60
Answer
LCM of 12 and 15= 60
Hope this helps :)
Answer: 455 different ways
(15 x 14 x 13) / (3 x 2 x 1) = 455