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evablogger [386]
3 years ago
10

a long-distance runner passes the 23 km mark of a race in 2 hr 30 min and passes the 44 mark 3 hours later. Assuming a constant

rate, find the speed of the long-distance runner in km/h
Mathematics
1 answer:
Vikentia [17]3 years ago
8 0

Answer:

The speed of the long distance runner is 8km/h

Step-by-step explanation:

In this question, we have a long-distance runner, running at a constant rate and we want to find his speed.

Mathematically,

speed = distance/ Time

From the question, we are told that he passes the 44km mark 3 hours after passing the 23km mark in 2 hours and 30 minutes

what this means is that the total distance he ran was just 44km

Now to the total time, that would be 2 hours 30 minutes + 3 hours = 5hrs 30 minutes or 5.5 hours

The speed is thus = 44km/5.5 hours =

8km/h

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soldier1979 [14.2K]

28% decrease

Solution:

Calculate percentage change

from V1 = 25 to V2 = 18

(V2−V1)|V1|×100

=(18−25)|25|×100

=−725×100

=−0.28×100

=−28%change

=28%decrease

7 0
3 years ago
Construct a truth table for the logical operator NOR.
Rasek [7]

Answer:

A   B   A NOR B

F   F        T

F   T        F

T   F        F

T   T        F

Step-by-step explanation:

The logical operator NOR produces a result that is the negation of the logical operator OR.

The truth table for the logical operator NOR can be obtained by the negation of the results of the truth table for the logical operator OR.

Let A and B be the the logical values (or inputs). The operator OR produces a value of true if and only if at least one operand is true. The truth table for OR is:

A   B   A OR B

F   F       F

F   T       T

T   F       T

T   T       T

So, the truth table for NOR is:

A   B   A NOR B

F   F        T

F   T        F

T   F        F

T   T        F

Notice that the negation of OR (which is NOR) is obtained by changing the F by T and the T by F in the column of the results.

This table can also be writen with 0 instead of False and 1 instead of True.

5 0
3 years ago
Write an equation in standard firm using integers y-4=5(x-8)
diamong [38]
I would say its y=5x-36
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What is the value of y?<br><br> Enter your answer in the box. <br><br> y= ??
kenny6666 [7]

Answer:

64

Step-by-step explanation:

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180-116=64

8 0
2 years ago
Read 2 more answers
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natulia [17]

Answer:

correct

Step-by-step explanation:

negative integers are still rational numbers if it is a whole number or complete

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