For x²+bx+c, to complete the square, you add (half of b)²
b=8 in this case, so you add 4², which is 16
x²+8x+16-16-4
y=(x+4)²-20 is the final form.
5,000 × 3.8%= 19,000×18= 342,000 × 40 = 13,680,000
Answer:
c= (1/4,2)
Step-by-step explanation:
i did the test and it came out correct i promise !
Answer:
grains of sand are in the Sahara Desert
Step-by-step explanation:
Given :
The Sahara Desert has an area of approximately 9,400,400 sq.km.
Depth = 150 m
To Find :Approximately how many grains of sand are in the Sahara Desert?
Solution:
Area of Sahara desert = 9,400,400 sq.km.

So, 

Volume of sand =
=

So, 

1 cubic cm holds grains of sand = 8000
holds grains of sand = 
= 
Hence
grains of sand are in the Sahara Desert
Answer:

Step-by-step explanation:
well the values for x are from -2 to ∞
so we can write it as
