Answer:
9
Step-by-step explanation:
area of a circle = pi times radius^2
254.34= 3.14 X r^2 get rid of 3.14 by dividing both sides by 3.14
254.34/3.14= r^2
81= r^2
find the square root of 81=9
The correct expression to simplify is:

Answer:

Explanation:
<u>1. Given expression</u>:

<u>2. Group like terms</u>:

<u>3. Simplify</u>:
- 4.25n + 5/4n = 4.25n + 1.25n = 5.5n
- 3/2p - 2p = 1.5p - 2p = - 0.5p = - 1/2p

Answer:
slope: -8
y-intercept: 11
Step-by-step explanation:
x = 1, 3
y = 2, -5
Answer:
4^5x-1=16
4^5x-1=4²eliminate 4
5x-1=2
5x=2+1
5x=3
x=3/5
log4(10x+2)=1
log4(10x+2)=log4 ⁴
eliminate log4
10x+2=4
10x=4-2
10x=2
x=2/10
x=1/5
difference between the is we use law of indices and logarithm to the questions respectively
similarities is we eliminate there base