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Rzqust [24]
3 years ago
11

Sam is observing the velocity of a car at different times. After three hours, the velocity of the car is 53 km/h. After six hour

s, the velocity of the car is 62 km/h.
Part A: Write an equation in two variables in the standard form that can be used to describe the velocity of the car at different times. Show your work and define the variables used. (5 points)
Mathematics
2 answers:
almond37 [142]3 years ago
6 0
To answer the question above, determine the velocity of the car at time zero. To do such, determine the increase in velocity every hour (acceleration). 

                                     a = (62 - 53) / (6 -3) = 3 km/ h^2

Calculate for the initial velocity (v) by using either of the velocities paired with the corresponding time,
        
                                     v = 53 km/h - (3 km/h^2) x 3 h = 44 km/h

The equation is <em>y = 44 + 3x</em>. Where x is the time in hours, y is the velocity in km/h. 


Murljashka [212]3 years ago
5 0

Answer:

x - (1/3)y = -44/3

Step-by-step explanation:

Let's call:

x: time

y: velocity of the car

The point-slope form is:

y - y1 = m(x - x1)

where m is the slope and (x1, y1) is a point in the line

The standard form is:

ax + by = c

(where a > 0)

We know two points of the line, (3, 53) and (6, 62). The slope is calculated as follows:

m = (62 -53) / (6-3) = 3

Replacing into the equation:

y - 53 = 3(x - 3)

y - 53 = 3x - 9

-3x + y = -9 + 53

(-3x + y)/(-3) = (-9 + 53)/(-3)

x - (1/3)y = -44/3

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Answer:

SAS Similarity Theorem

Step-by-step explanation:

we know that

<u>SAS Similarity Theorem</u>: States that if two sides in one triangle are proportional to two sides in another triangle and the included angle in both are congruent, then the two triangles are similar

In this problem

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and

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substitute the values

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4 years ago
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VikaD [51]

Answer:

6/5 < x < 10/3 is the desired solution.

Step-by-step explanation:

Here, the given compound inequality is :

x + 1 < -2 x + 11 < 3 x + 5

Now, consider the first two term of the inequality, we get:

x + 1 < -2 x + 11

Subtracting 1 from both sides, we get:

x + 1  - 1 < -2 x + 11  - 1

or, x < -2x + 10

or, x + 2x < 10

or, 3 x < 10

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Similarly, considering the last two terms of the given inequality, we get:

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Subtracting 11 from both sides, we get:

-2 x + 11  - 11 < 3 x + 5 - 11

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So, the desired value of x should be more than (6/5) but less than (10/3)

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Answer:

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Step-by-step explanation:

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