Batteries are sold in packets and boxes

Each packet contains 8 batteries
Each box contains 25 batteries

Jonathon buys p packets of batteries and b boxes of batteries

write down an expression in terms of p and b for the otal number of batteries bought by jonathon.

8p + 25b = y

Step-by-step explanation:

8 batteries are sold for each packet, or p, and 25 batteries are sold for each box, or b. Y is the total amount of batteries Jonathon buys based on how many packets and batteries he gets.

the coefficient of x in the expansion is 2

Step-by-step explanation:

(x+3)(x-1)= (x)(x) + (x)(-1) + (3)(x) + (3)(-1)

which equals x^2 -x +3x -3 which is x^2 +2x -3

the leading coefficient of x^2 1. and the coefficient of x is 2.