A plant is already 54 centimeters tall, and it will grow one centimeter every month.
Let H be the plant's height (in centimeters) after M months.
Write an equation relating H to M. Then use this equation to find the plant's height after 21 months.
Equation:
OO
O=D
x
Plant's height after 21 months:
centimeters
S
?

H = 54 + M cm ;  75 cm

Step-by-step explanation:

After 1 monnth, height increases by 1 cm

So, after M months, height increases by (1*M) or M cm

So, Total height , H = 54 + M cm

you can't solve x because it is 2 linear equation and you only have one equation

a variable is any characteristics, number, or quantity that can be measured or counted. a variable may also be called a data item. hope i !