After substituting, what is the first step when evaluating x+3x-4.2 when w=5?
2 answers:
Answer:
After substituting the first step is to open the bracket of middle term
Step-by-step explanation:
Given the equation
when x=5, we have to determine the first step after substitution.
The first step is to open the bracket of middle term
Then next step is to adding first two terms by BODMAS rule
Now subtraction, we get 15.8
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Answer:
The horizontal distance the ball travels before it hits the ground is 22. feet
Step-by-step explanation:
The given parameter are;
The function modelling the path of the ball tossed by Nate y = -14·x² + 335·x
x = The horizontal distance the ball travels from Nate in feet
y = The height of the ball in feet
The line equation modelling the hill is y = 15·x
The point where the ball hits the ground is given by the point the graph of the equation for the path of the ball and the path of the model of the line of the hill meet as follows;
Ball path is y = -14·x² + 335·x
Hill path is y = 15·x
The point both paths meet and the ball hits the ground is -14·x² + 335·x = 15·x
Which gives;
-14·x² + 335·x - 15·x = 0
-14·x² + 320·x = 0
320·x - 14·x² = 0
x × (320 - 14·x) = 0
x = 0, or x = 320/14 = 22 6/7 = 22. feet
Therefore;
The horizontal distance the ball travels before it hits the ground = x = 22. feet.