The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable
Answer:
Y=2x+4
Step-by-step explanation:
Anwser: 28 :) 35 DEVIDED BY 5 IS 7 AND 7 X 4 IS 28
Answer:
it should be step 2
Step-by-step explanation:
Area = pi*r^2
Circumference = 2pi*r
Step 1: find the radius from area
81pi=pi*r^2
81=r^2
9=r
Step 2: plug in radius to the circumference equation
Circumference = 2pi*r
18pi is the answer, otherwise know as 56.52 as well.
