A tree in Christine's backyard is 38 centimeters high. The tree grows 7 centimeters each month. Within the first month of planting it, Christine trimmed 4 centimeters off its height. She has not trimmed the tree since then. How long has the tree been growing?
(a) Write an equation to help answer the question above.
Choose the correct form below and fill in the blanks using only 4, 7, and 38.
(The variable is used to represent the number of months.)
blankx+ blank = blank
blankx-blank=blank
(b) Write an expression to help answer the question above.
Choose the correct form below and fill in the blanks using only 4, 7, and 38.
blank + blank / blank blank-blank/blank
(c) How long has Christine's tree been growing?
(a) 7x - 4 = 38
(b) 38 - 4 / 7
(c) To find out how long Christine's tree has been growing, we can solve the equation 7x - 4 = 38:
7x - 4 = 38
7x = 42
x = 6
Therefore, the tree has been growing for 6 months.
b is wrong
I apologize for the mistake.
(b) 38 - 4 / 7 = 34 / 7 = 4
Therefore, the tree has been growing for 4 months.