#sol1
a1=1×4-1=3
a2=2×4-1=7
a3=3×4-1=11
a4=4×4-1=15
a5=5×5-1=19
#sol2
f(1)=1×4-1=3,
f(n+1)=f(n)+4,
so .... you know.
x= 4.5
18x - 9 = 72 are the equations
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- Elisha
Your answer is D)16. To find the average, add up all the numbers and divivde by the number of numbers there is
Answer:
<u>27</u> = <u>3</u> = <u>18</u> = <u>5</u><u>4</u>
36 4 24 72
Step-by-step explanation:
27÷3=9 (WHAT YOU DO TO THE TOP YOU HAVE TO DO TO THE BOTTOM)
36÷9=4
24÷4=6 (WHAT YOU DO TO THE TOP YOU HAVE TO DO TO THE BOTTOM)
6×3=18
54÷18=3 (WHAT YOU DO TO THE TOP YOU HAVE TO DO TO THE BOTTOM)
24×3=72
A straight line adds up to 180
So the line opposite of 137 should add up to 180
This gives us the equation 137+x=180 then x=43
The triangle also adds up to 180 degrees
So 102+43+x=180
The equation can be simplified to 145+x=180 therefore x=35
So x+?=180 because it is a straight line.
We can substitute x in making the equation 35+?=180
Now we want to solve for the ? so we'll subtract 35 from each side
This leaves us with the equation ?=145
So we now know that the ?=145
