Answer:
x = 23
Step-by-step explanation:
2x -3 + 47 = 90
2x = 46
x = 23
You just need to see if you can isolate the y-variable.
Answer:
384
Step-by-step explanation:
18 dozen plus 13 dozen equals 32 then multiply by 12 equals 384
Figure 1
n=1→f(n)=f(1)=1
Options 2 or 3
Figure 2
n=2→f(n)=f(2)=5
With Option 2:
f(n)=f(n-1)+2n
n=2→f(2)=f(2-1)+2(2)
f(2)=f(1)+4=1+4→f(2)=5 ok
With Option 3
f(n)=f(n-1)+n
n=2→f(2)=f(2-1)+2
f(2)=f(1)+2=1+2→f(2)=3 No
Answer: Second option: f(1)=1; f(n)=f(n-1)+2n; for n>=2
