First, fint the roots of the equation
1.

2. You can see that this equation has two different real roots. Note that you can make this statement without finding roots, only knowing the value of discriminant: since D=81>0, then the equation has two different real roots.
#5. $5.50 + 0.89r would be less than 26.00.
#19. 10x + 4 = 30 would be correct.
#20. would be C.
Hope this helps.
Hello,
sin² x-cos² x=sin² x-(1-sin² x)=2sin² x-1
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Answer:
B Step 2
Step-by-step explanation:
5(-3) should be -15, not positive 15
Answer:
8/45
Step-by-step explanation: