Ezra is training for a track race. he starts by sprinting 100 yards. he gradually increases his distance, adding 5 yards for 21 days. the explicit formula that models this situation is an=100+(n-1)5. how far does he sprint on day 21

the answer would be 200 i think

He sprint 200 yards on day 21.

Step-by-step explanation:

The given explicit formula is:  , where is the number of days.

For the day 21, the value of will be:  

Plugging this into the above explicit formula....

So, he sprint 200 yards on day 21.

the answer i think is a)

step-by-step explanation:

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it