Hi guys! I'm back with another probability problem I've struggling on. Please DO NOT leave any links or you will be reported. Please help explain what I'm doing wrong and what I'm suppose to do. This is confusing me.

Pizza parlor A advertises 35 different​ three-topping pizzas. How many individual toppings does Pizzeria A actually​ use? Pizzeria B advertises 55 different​ two-topping pizzas. How many toppings does pizza parlor B actually​ use? ​(Hint​: In these​ problems, you are given the total number of​ combinations, and you must find the number of toppings that are​ used.)

Pizza parlor A uses nothing different toppings. ​(Type a whole​ number.)

Thank to anyone who decides to help :) ​

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

f(x)=4

step-by-step explanation:

step-by-step explanation:

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)