Answer:
2 1/2, 0 and 3 1/2, 0
Step-by-step explanation:
75*.2=15
you would save $15
hope that helps
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Remember
difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)
(x)^2-(7)^2=(x-7)(x+7)
set to zero
x-7=0
x=7
x+7=0
x=-7
x=-7 or 7
Answer:
64
Step-by-step explanation:
<u>ASSUMING WE STARTED WITH ONE BACTERIA</u>
there are 3 20 minute marks in an hour.
3 x 2 = 6
So are going to do the following
1 x 2 = 2
2 x 2 = 4
4 x 2 = 8
8 x 2 = 16
16 x 2 = 32
32 x 2 = 64
...
So in two hours a bacteria that increases two times every twenty minutes would multiply into sixtyfour bacteria in 2 hours.