9514 1404 393
Answer:
B. 3x² +2 = 0
Step-by-step explanation:
The equation of A has a couple of real roots. We're pretty sure there are complex numbers that will satisfy this equation, but we don't know how to find them. (We suspect a typo, and that the equation is supposed to be 2x² +1 = 7x, which has only real roots.)
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The equation of B can be rewritten as ...
x² = -2/3
This will have complex roots.
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The discriminants of both equations C and D are positive, so those have only real roots.
2x² -5x -1 ⇒ d = (-5)² -4(2)(-1) = 33
3x² -6x -1 ⇒ d = (-6)² -4(3)(-1) = 48
Answer:
Translate?
Step-by-step explanation:
Answer:
Step-by-step explanation:
We want to find the value of 
for which 
We take logarithm to base 2 of both sides.
Recall that: 
Answer:
Firstly Subtract the weekly charge from the total
257.60 - 160 = 97.6
So 97.6 was charged for miles travelled
Since we know one mile is for 0.15, we divide
97.6 ÷ 0.15 = 650.7
Therefore 650.7 miles were travelled.
Answer:
$113.81
Step-by-step explanation:
Find the cost for one book:
35.94 / 6 = 5.99
Multiply 5.99 with the number of books buying:
5.99 x 19 = 113.81
