How do i write an equation to figure out four numbers that i don't know when the sum of those four numbers us 104 and includes the variable d?

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.