Vlad spent 20 minutes on his history homework and then completely solved x math problems that each took 2 minutes to complete what is the equation that can be used to find the value of y the total time thay vlad spent on his homework and what are the constraints on the value of x and y

y = 2x + 20

Step-by-step explanation:

Vlad spent 20 minutes on history. Then Vlad spent 2 minutes on each math problem for homework, this is 2x. So in total, he spent 20+2x on homework. Depending on how many problems he did, the total time y can be found. This is the equation 20+2x=y.

If Vlad did 0 math problems then he spent at least 20 minutes on homework from history. This is the constraint .

We also know Vlad can do many math problems but the least amount he did was 0, so the second constraint is .

step-by-step explanation:

this is not a question

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.