Let your age be 'X'
Then the age of your brother will be
The age of your sister is 10, but can also be written as an expression (since it is the age of your brother +6)
Now we get the following equation:
Subtract 6 from both sides
Multiply by 3
Hence, the answer on your question (which is your age) is 12.
The diameter is actually 12 feet. the area i believe is pi(radius)squared. so the area would come out to 36pi. if you want it to not be with the word pi, multiply 36 by 3.14.
i hope this helps.
Answer: 3. 117 cm^2
4. 104 m^2
Step-by-step explanation:
See images attached
Let x=L.
Then let 3x+2=W
Giving you 124=(x)+(x)+(3x+2)+(3x+2)
Then simplify and solve.
124=8x+4
124-4=8x
120=8x
120/8=x
15=x
Then put that value back into the original equations to find the dimensions.
x=L
15=Length
and
3x+2=W
3(15)+2=W
77=Width