The function j(x) = 39x represents the number of jumping jacks j(x) you can do in x minutes. How
many jumping jacks can you do in 5 minutes?
(1 point)
• 195 jumping jacks
• 7 jumping jacks
• 144 jumping jacks
• 234 jumping jacks
To find out how many jumping jacks you can do in 5 minutes, you simply need to substitute x = 5 into the function j(x) = 39x.
j(5) = 39(5) = 195
Therefore, you can do 195 jumping jacks in 5 minutes.
The correct answer is 195 jumping jacks.