Hi there! :)
Answer:
The predicted height of the plant is 102.5
Step-by-step explanation:
The variable "t" in your expression is the number of days from today, and that the whole expression is equal to the predicted height of the plant :
"t" = number of days from today
1.5t + 20 = predicted height of the plant
You want to know the predicted height of the plant 55 days from today.
SO, in other words, you want to know what the expression is equal to when "t" is equal to 55.
In order to answer your question, you'll have to replace the "t" in the expression by its value, which is 55, and solve the expression to find what it equals to:
1.5t + 20 = X
1.5(55) + 20 = X
Multiply 1.5 by 55 → 1.5 × 55 = 82.5
82.5 + 20 = X
Add 20 to 82.5 → 82.5 + 20 = 102.5
102.5 = X
There you go! I really hope this helped, if there's anything just let me know! :)
