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3 years ago

This is a record of a marble being rolled along the ground. what was the marbles average speed for this entire trip brainly

Mathematics

2 answers:

yuradex [85]3 years ago

6 0

Answer:

The speed of marble is 1.5 m/s

Step-by-step explanation:

Consider the graph shown below.

As we know: $speed=\frac{Distance}{Time}$

To find the speed we need to substitute the value of distance and time by using the graph shown below.

From the graph we know when time was 0s marble covers a distance of 0 m.

When time was 2s marble covers a distance of 3 m.

Now substitute the value of distance and time in above formula.

$speed=\frac{3}{2}$

$speed=1.5$

Hence, the speed of marble is 1.5 m/s

saw5 [17]3 years ago

5 0

The answer is 1.5 m/s

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2 years ago

Dado el número N = 4752a, averigua qué valor ha de tomar "a" para que: a) N sea divisible por tres. b) N sea divisible por cinco

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Answer:

I will answer it in English:

a) We have te number N = 4752a

if we want to divide it by 3, then the addition of all the digits must be a multiple of 3.

Sum = 4 + 7 + 5 + 2 + a = 6 + 7 + 5 + a = 18 + a

and 18 is a multiple of 3, then we can have, a = 0, a = 3, a = 6, a= 9

b) A number is divisible by 5 if it ends on 5 or 0, so the possible values of a are 0 and 5.

c) we know that 15*3 = 45

then 15*3000= 45000

now we have:

4752a - 45000 = 252a

15*13 = 2520

then we have that a must be equal to zero, and:

15*(13 + 3000) = 47520

d) We want a number that when we divide it by 7, the surpass is 5.

a number is divisible by 7 if the difference between the number without the units and the double of the units is 0 or a multiple of 7.

in N = 4752x the unit is a, then we have:

D = 4752 - 2*x

now, let's choose a such we have a multiple of 7

we know that 5746 is a multiple of 7, so we can choose x= 3 and get:

D = 4752 - 2*3 = 5746

So the number N = 47523 is a multiple of 7, and when we divide it by 7 we will have a surpass of 0.

Then when we divide N + 5 by 7, we will have a surpass of 7.

This is: N + 5 = 47528

This means that the actual value of a that we need is 8.

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3 years ago