Question

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 that Vlad spent on his homework, and what are the constraints on the values of x and y?
a. y=2x+20; x is any integer greater than or equal to 0, and y is an integer greater than or equal to 20.
b. y=2x+20; x is any real number greater than or equal to 0, and y is any real number greater than or equal to 20.
c. y=20x+2; x is any integer greater than or equal to 0, and y is an integer greater than or equal to 20.
d. y=20x +2; x is any real number greater than or equal to 0, and y is any real number greater than or equal to 20.

Answer 1

Answer:

Its A

Step-by-step explanation:

Answer 2

Answer: b. y=2x+20; x is any real number greater than or equal to 0, and y is any real number greater than or equal to 20.

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

time spent on  history homework: 20 minutes

time spent on each math problem: 2 minutes

math problem : x

total time spent  :y

So, we have to multiply each math problem (x) by the time spent on each math problem and add the 20 minutes spent on history homework.

The expression obtained is equal to the total time spent

Mathematically speaking:

y=2x+20

x can be any real number greater than or equal to 0, ( it would be 0 if there aren't any math problems)

and y is any real number greater than or equal to 20. ( 20 minutes is the minimum time spent if there aren't any math problems)