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8_murik_8 [283]
3 years ago
14

Remy has a job at the local store. He spends $80 in a game parlor and $250 for food per month, and saves the rest of his salary.

If x represents his monthly salary in dollars, which expression represents the amount in dollars that he saves monthly?
A.
x – 80 + 250


B.
x – 80 – 250


C.
250 – 80 + x


D.
x + 250 + 80
Mathematics
2 answers:
xxTIMURxx [149]3 years ago
5 0
The answer to this question is B. x - 80 - 250
Serga [27]3 years ago
3 0
I think B would be the right answer
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Answer:

The equation that models the situation is s_{f} = 4+\frac{v_{f}^{2}-2500}{64.348}.

Step-by-step explanation:

Let suppose that effects from air friction and Earth's rotation can be neglected, so that the softball can be modelled experiment a free fall, that is, an uniform accelerated motion due to gravity. From we know the initial velocity and position of the position and we can determine the final position of the ball as a function of the final velocity:

v_{f}^{2} = v_{o}^{2}+2\cdot a \cdot (s_{f}-s_{o}) (1)

Where:

s_{o}, s_{f} - Initial and final position of the softball, measured in feet.

a - Acceleration, measured in meters per square second.

v_{o}, v_{f} - Initial and final velocities of the softball, measured in feet per second.

If we know that v_{o} = 50\,\frac{ft}{s}, a = -32.174\,\frac{m}{s^{2}} and s_{o} = 4\,ft, then the equation that models the situation is:

v_{f}^{2} = 2500-64.348\cdot (s_{f}-4)

Then, we clear the final position of the softball:

-\frac{v_{f}^{2}-2500}{-64.348} = s_{f}-4

s_{f} = 4+\frac{v_{f}^{2}-2500}{64.348}

The equation that models the situation is s_{f} = 4+\frac{v_{f}^{2}-2500}{64.348}.

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