PLEASE HELP I’ll GIVE BRAINLEST! Which number would form a triangle

Will mark brainliest if you answer ! the taco shop sold 198 lunches friday. this number is 3 more than 3 times the number they sold monday. let n represent the number of lunches sold monday. which equation shows an equality between two different ways of expressing the number of lunches sold on friday? a. n – 3 = 198 b. 3n – 3 = 198 c. 3n + 3 = 198 d. n + 3 = 198

Ten times the square of a non-zero number is eqaul to ninety times the number

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18