10 is the sum of 1 and two times a number. Have to write it in number form

10=1+2a or 2a+1=10

A sum is the answer to an addition equation. 1 is being added to 2a. A number can be written as any letter in the alphabet(called a variable in math terms).

hope it helps!

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

mx+89b(-98)nb

step-by-step explanation: