Pretty sure you already had something posted about this... in case you've lost it, or have questions:
#25 is fairly simple. Plug in -4 and 3 into the equation, and the extraneous root will be the one that does not work.
Extraneous root in this case is positive four since +4≠-4
<span>
</span>In this case it's negative 3, since -3≠3
#29 can be turned into a quadratic equation.
Square both sides to get
Then bring the 2x+3 to the other side, setting the quadratic equal to zero.
Factor to find that it's equivalent to
(x-3)(x+1)=0
Therefore x is equal to positive 3 and negative 1. Plug both back into the original equation. Whichever does not work is the extraneous root, and the answer is the one that does.
<span>
</span><span>
</span><span>
</span>Extraneous root would be negative 3.
<span>
</span><span>
</span>Extraneous root would be positive 1.
Your answers are positive 3 and negative 1.
<span>Extraneous roots are negative 3 and positive 1.</span>
Plan A at 60 calls : 60*.25 + 25 = 15 + 25 = 40
Plan A is equal plan B at 60 calls
So if more than 60 calls the plan B will cost less than plan A
Answer: more than 60 calls
Answer:
52.24 km
Step-by-step explanation:
Given that,
The distance needed to stop a car, d, varies directly as the square of the speed, s, at which it is travelling.
d = ks²
Where
k is constant
When s₁ = 70 km/hr, d₁ = 40 m, s₂ = 80 km/hr, d₂ = ?
So,
So, the new distance is 52.24 km.
Answer:
Well what can i help you with?
Step-by-step explanation:
Answer:
$45.5
Step-by-step explanation:
Assuming that there is no tax or change in rate its simply $91 divided by two. We know that 45 is half of 91, 45.5 x 2 = 91