80 brainliest to first correct marika is training for a track race. she starts by sprinting 100 yards. she gradually increases her distance, adding 4 yards a day for 21 days. the explicit formula that models this situation is an = 100 + (n – 1)4. how far does she sprint on day 21?

n = number of days.

We have then that for day 21, n = 21.

Substituting we have:

a21 = 100 + (21-1) * 4

a21 = 180

she sprints 180 yards on day 21

the answer is 45 i just did it on oddesy ware

i think there was a typo. you wrote pat brings 3 quarts of ice-cream to the party. each serving of ice-cream is 1 6 quart. how many total servings of ice-cream does pat bring to the party? i think the bold is supposed to be 1/6. so 1 quart of ice cream = 6 servings. 6 * 3 = 18.