What is 13+1

I will mark brainliest

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is

Is the ordered pair (-10, 7) a solution to the equation y = 17 – x? yes or no