Answer
a. The volume is multiplied by 4
b. The volume is doubled
Explanation
a. The volume of a cone with radius r and height h is
. If the radius is doubled, the new volume will be
, which is equal to
. This means that the volume is multiplied by 4.
b. The volume of a cone with radius r and height h is
. If the height is doubled, the new volume will be
, which is equal to
. This means that the volume is multiplied by 2.
Best to factor 5 out of the first 2 terms:
5x^2-7x+2=0 => <span>5(x^2 - [7/5]x) +2=0
Take half of [-7/5]: That'd be -7/10.
Square 7/10, add it to </span>5(x^2 - [7/5]x) +2=0 and then subtract it:
5(x^2 - [7/5]x)+ 49/100 - 49/100 ) +2=0
Then we have 5(x- [7/10] )^2 - 49/100 ) + 200/100 = 0
5(x-7/5)^2 - 245/100 + 200/100 = 0
5(x-7/5)^2 - 45/100 = 0
Dividing all terms by 5, x-7/5 = plus or minus sqrt( 9/100 )
x-7/5 = plus or minus 3/10
Then one root is x = 7/5 + 3/10, or x= 17/10 (answer #1)
The other is x = 7/5 - 3/10, or x = 14/10 - 3/10, or x = 7/10 (answer #2)
Answers:
Part 1: 5
Part 2: 4/6 m
Part 3: 
Part 4: 5
Part 5: 4/6 m
Step By Step Explanation:
math
Answer:
guess they never miss HUHHHH
Step-by-step explanation:
:))
Answer:
the first one is right but the second one is -2 , not 2.
Step-by-step explanation: