Whath percentage of 1m is 76cm

What is the additive identity for rational numbers?

Vanyuwa [196]

Answer:

Step-by-step explanation:

The rational number 0 is the additive identity for rational numbers.

As,

If we add any rational number to zero we get that number itself.

E.g.

$0 + \frac{1}{2} = \frac{1}{2}$

and

$0 + ( - \frac{5}{6} ) = ( - \frac{5}{6} )$

4 0

3 years ago

Read 2 more answers

an arrow is shot vertically upward from a platform 33ft high at a rate of 174 ft/sec. when will the arrow hit the ground?

Cloud [144]

Answer:

h(t) = -16t2 + 186t + 43

at the ground h = 0

hence; -16t2 + 186t + 43 = 0

solving this quadratic equation using the quadratic formula ; a = -16, b = 186, c = 43 ; x = (-b +-(b2 - 4ac)1/2)/2a

gives t = 11.8 seconds to the nearest tenth (note that the negative root has no practical significance)

Step-by-step explanation:

3 0

3 years ago

At the school track meet, Dita ran 100 meters at a rate of 6. 25 meters per second. Time = StartFraction distance Over rate EndF

tiny-mole [99]

Answer:

16 seconds

Step-by-step explanation:

So, we know that distance equals 100.

We also know that Dita covers 6.25 meters of this distance every second.

Since this is 6.25 PER second, we can write this as 6.25s, where s is seconds.

To find the seconds it takes to cover 100 meters in distance, we can write the following equation:

6.25s = 100

This makes sense, since the 100 meters in distance is equal to the rate of change in meters, times the seconds.

Now we just need to solve for s.

To do this, we must get s alone. We can do this by dividing 6.5 from both sides:

$\frac{6.25}{6.25}s = \frac{100}{6.25}$

=

s = 16

So this means the seconds it takes to go 100 meters is 16 seconds, your first answer option

hope this helps! :3

7 0

2 years ago

Read 2 more answers

-10 + 15xy = 20 Direct and inverse variation. constant of variation (k)

lozanna [386]

Answer:

This is an inverse variation, and the constant of variation is k = 2.

Step-by-step explanation:

Direct variation is something like:

y = k*x

Where k is the constant of variation.

So as x increases also increases y.

Inverse variation is something like:

y = k/x

k is the constant of variation.

In this case, if x increases, y decreases.

Now let's look at the equation:

-10 + 15*x*y = 20

Let's isolate y in one side of the equation:

15*x*y = 20 + 10 = 30

15*x*y = 30

y = 30/(15*x) = (30/15)/x = 2/x

y = 2/x

Then we can conclude that this is an inverse variation, with a constant of variation equal to 2.

4 0

3 years ago

Delia relative long jump length was recorded as 0. What does this mean

Deffense [45]

When we say about an object relative to something, this only means that we are comparing an object’s characteristic to that of our reference. So in this case, I think we are referencing Delia’s jump to someone else. Say our reference has a long jump length of 5 meters, since Delia’s relative long jump length is 0, this means that relative to the reference there is no difference. Therefore, Delia’s jump length is also 5 meters.

3 0

4 years ago