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Nana76 [90]
4 years ago
12

Average speed is calculated by dividing total distance with the time it takes to complete it. True False

Mathematics
1 answer:
Aliun [14]4 years ago
4 0

Answer:True

Step-by-step explanation:

Average speed refers to the total distance covered in a specific time . it also a scalar quantity (has magnitude but no direction)

Average speed=distance / time

-Speed is in kilometers/hours or meter/seconds

-distance is in kilometers or meters

-time is in hours or seconds

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On a particular day, the wind added 5 miles per hour to Alfonso's rate when he was cycling with the wind and subtracted 5 miles
sattari [20]

speed with no wind = s

speed with wind = s + 5

speed against wind = s - 5

time = t

speed = distance/time

distance = speed * time

With wind, time = t, speed = s + 5, distance = 50

50 = (s + 5)t

Against wind, time = t, speed = s - 5, distance = 30

30 = (s - 5)t

t = 30/(s - 5)

50 = (s + 5) * 30/(s - 5)

50(s - 5) = (s + 5) * 30

50s - 250 = 30s + 150

20s = 400

s = 20

Answer: 20 mph

3 0
4 years ago
Steven read 2 12 of the 8 books he
professor190 [17]

Answer:

1.33 percent of his 8 books.

Step-by-step explanation:

Assuming you mean \frac{2}{12} , that equates to 1.33 percent of 8, thus he has read <em>one whole book </em>and is reading his second one.

4 0
3 years ago
Is this statement true or false?
shutvik [7]
True
Explanation: I know stuff
3 0
3 years ago
Solve 3(x-4)=-5 for x. Justify each step
igor_vitrenko [27]
3x - 12 = -5 plus 12
3x-12 +12 = -5+12
3x = 7 devision by 3
3x/3 = 7/3
x= 2,3333333333 =~ 2,3
4 0
3 years ago
How are rigid transformations used to justify the sas congruence theorem?
scZoUnD [109]

Answer:Rigid transformations preserve segment lengths and angle measures.

A rigid transformation, or a combination of rigid transformations, will produce congruent figures.

In proving SAS, we started with two triangles that had a pair of congruent corresponding sides and congruent corresponding included angles.

We mapped one triangle onto the other by a translation, followed by a rotation, followed by a reflection, to show that the triangles are congruent.


Step-by-step explanation:

Sample Response: Rigid transformations preserve segment lengths and angle measures. If you can find a rigid transformation, or a combination of rigid transformations, to map one triangle onto the other, then the triangles are congruent. To prove SAS, we started with two distinct triangles that had a pair of congruent corresponding sides and a congruent corresponding included angle. Then we performed a translation, followed by a rotation, followed by a reflection, to map one triangle onto the other, proving the SAS congruence theorem.

6 0
3 years ago
Read 2 more answers
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