This is an arithmetic series, so we know, that:
Sum = (First term + Last term) * Number of terms /2
Here we have:
First term = 33
Last term = 104
Number of terms = 104 - 33 + 1 = 72
and
-12y+14-9y=14
-21y=0
y=0, x=7
Answer:

Step-by-step explanation:

Multiply 8 with 2h and 1

Answer:
yuh
Step-by-step explanation: