Julian sees a common denominator for 3 x 4 + 2
1 answer:
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Answer:
The x-intercept will tell you how many seconds have passed before Dante lost sight of the rock.
Step-by-step explanation:
The problem specifies that the function d(s) will model the depth in feet of a rock that Dante dropped into a lake s seconds after he lost sight of the rock.
In this case we are using an s instead of the x, so the x-intercept will represent a given time. We can find the x-intercept by setting the function equal to zero, like this:
-5s-15=0
when solving for s we get:
s=-3
This means that Dante dropped the ball into a lake 3 seconds before he lost sight of the rock. This is what the negative stands for, some time in the past.
So the x-intercept tells us the time it took for Dante to lost sight of the rock.
Multiply both-side by (x-8)
3x > 1(x-8)
3x > x - 8
Collect like term
3x- x >-8
2x > -8
Divide both-side by 2
x > -4
This can be represent as;
This can be represented in interval notation as ( -4, ∞)
