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Contact [7]
1 year ago
10

Hi, I am taking PSAT and I am working on the math section. I need help with answering this math type of question. Please give th

e best explanation.

Mathematics
1 answer:
ValentinkaMS [17]1 year ago
4 0

By using the concept of uniform rectilinear motion, the distance surplus of the average race car is equal to 3 / 4 miles. (Right choice: A)

<h3>How many more distance does the average race car travels than the average consumer car?</h3>

In accordance with the statement, both the average consumer car and the average race car travel at constant speed (v), in miles per hour. The distance traveled by the vehicle (s), in miles, is equal to the product of the speed and time (t), in hours. The distance surplus (s'), in miles, done by the average race car is determined by the following expression:

s' = (v' - v) · t

Where:

  • v' - Speed of the average race car, in miles per hour.
  • v - Speed of the average consumer car, in miles per hour.
  • t - Time, in hours.

Please notice that a hour equal 3600 seconds. If we know that v' = 210 mi / h, v = 120 mi / h and t = 30 / 3600 h, then the distance surplus of the average race car is:

s' = (210 - 120) · (30 / 3600)

s' = 3 / 4 mi

The distance surplus of the average race car is equal to 3 / 4 miles.

To learn more on uniform rectilinear motion: brainly.com/question/10153269

#SPJ1

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A service call to repair a washing machine costs $35 plus $20 per hour. Raphael ‘s machine took 2 hour to fix. How much did the
Lady bird [3.3K]

There is a mandatory fixed rate of $ 35 that Raphael will have to pay once the service call has been made. This fixed rate is the constant.

The per hour rate is $20. Suppose the machine took "x" hours to get fixed. Then the variable part of the repair cost will be 20x.

Thus, Repair Cost=Fixed Rate Cost+Variable Cost

Or, y=35+20x where y is the total repair cost. Thus, if Raphael ‘s machine took 2 hour to fix, the repair cost is:

y=35+20\times 2=35+40=75 dollars.

Therefore, the last option is the correct option.

5 0
3 years ago
Read 2 more answers
Examine the following sequence 1, 4, 9, 16, 25…. Why is 36 the next number in the sequence? Because the pattern is:
Alexxandr [17]
Its a sequence of squares .....      sixthe term = 6^2 (36)
6 0
3 years ago
A line passes through the points (3,9) and (5,1). What is the equation in point slope?
Kipish [7]
The slope is equal to -4.
Hope this helps!
8 0
4 years ago
What is 2x3y if x = -2y =4
Lilit [14]

Answer:

-48

Step-by-step explanation:

2x3y

\/

2(-2) * 3(4)

\/

-4 * 12

\/

-48

Have a nice day!

    I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

4 0
3 years ago
Read 2 more answers
If x+y = z and y−z=x which of the following must be equal to z?
umka21 [38]

<u>ANSWER</u>

(C) y

<u>EXPLANATION</u>

We have two equations:

The first one is

x + y = z...(1)

The second equation is

y - z = x...(2)

Let us make z the subject of this second equation:

\implies \: -x +y = z...(3)

We now add equation (1) and (3) to get:

(-x + x) + (y +  y) = z + z

We simplify to get:

0+2y= 2z

2y= 2z

Divide throu by 2.

\frac{2y}{2}  =  \frac{2z}{2}

y= z

\therefore \: z = y

The correct answer is C

8 0
4 years ago
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