Answer:
131.25
Step-by-step explanation:
25r²-10r+10r-4=0
25r²-4=0 (Since -10 and 10 cancel each other out)
25r²=4
Divide both sides by 4 to get r² = 6.25
Square both sides to get r = 2.5
Plug 2.5 back into the equation to get the answer of 131.25
(4,1) is a possible solution. Hope this helps. :)
What so you need to know?
Answer: -8
Step-by-step explanation:
Put -8 in place of all of the x variables when I solved the top was equal to 40 and the denominator was equal to -5 and 40/-5 is equal to -8
Area = π x r^2
Area = π x 12^2
Area = 144π or 452.16 square units. ( using 3.14 for PI)
Circumference = 2*PI *radius
Circumference = 12π or 37.68 units ( using 3.14 for PI)
