John needs 23 boards to build rafters for his house he can use 16 foot or 20 foot lengths boards he needs seven fewer 16 foot boards that 20 foot boards write and solve a system of equations to determine how many of each size board john needs

853.3

step-by-step explanation:

answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb

1. 2

2. 11

3. 5

4. 6

5. 7

6. 5

7. -1

8. 1

step-by-step explanation: