What multiplies to -8 and adds to -2

Asequence is defined recursively by the formula  f(n  +  1)  =  f(n)  +  3 . the first term of the sequence is  –4. what is the next term in the sequence? –7–117

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

How many triangles can be drawn with side lengths 4 centimeters, 4.5 centimeters, and 9 centimeters? explain