Answer is 32cm^2. See attachment for the working.
Answer:
6x = y
Step-by-step explanation:
6 sets equals total cost.
Answer:

Step-by-step explanation:
The first step is to realize that this is a geometric sequence, where each next term in the sequence is 2.5 times larger than the previous. You can confirm this by the fact that 3=1.2*2.5, 7.5=3*2.5, and 18.75=7.5*2.5. Now, you can write the formula, where n is where the number is in the sequence, and a is the number itself. Since 1.2 is the first term in the sequence and the rate of expansion is 2.5, the formula is:

Hope this helps!
Since y is the variable, x is considered here as a constant.
Then :
-x + 3y = -6
we add x in both left side and right side of the equation :
-x + x + 3y = -6 + x
3y = -6 + x
Then we divide both side by three :
3y / 3 = (-6+x) /3
y = (-6+x)/3
y = -6/3 + x/3
y= -2 + x/3