Recall that the quadratic formula is
x=(-b+/-sqrt(b^2-4ac)/2a
So the formula cannot be used whenever a=0, in other words, the coefficient of the x^2 term is zero. All other situations do not render the formula inapplicable.
1. B
2. C
5.
<span>TABLE
0 32 </span>
<span>5 16 </span>
<span>10 8 </span>
<span>15 4 </span>
<span>20 2
after 25 days ----> from 32g to 1g
first column: increments of +5; arithmetic sequence
second clmn: x5 ; geometric sequence
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#4 is 20
#5 is false
#6<span> 3.Reflexive Property
4.</span><span>SSS Congruence Postulate</span>
since 3c is not equal to 2c, this means that the expressions are not equal
