Question

Find the area of the regions enclosed by the lines and curves.
y = 9x - x^2 and y = 20

Answer 1

integrate maybe?

Answer 2

integrate 9x - x^2 - 20 between its x intercepts

Answer 3

integrate them between 9 & 0 and 20 & 0 respectively

Answer 4

i was thiniking 5 and 4 but ....

Answer 5

ok ill try it

Answer 6

i'm not sure about it....sorry...

Answer 7

- x^2 +9x - 20

- (x^2 -9x +20)

-5,-4 = 20, and -9

Answer 8

i got -121/6 but thats not an answer choice

Answer 9

check your algebra ... ill dbl chk as well

Answer 10

ok

Answer 11

yeah, im not getting -121/6 seems about -12 off

Answer 12

ok 1/6?

Answer 13

\[-\int_{4}^{5}(x^2-9x+20)~dx\]

Answer 14

yep .. -121/6, if you remove the -12 is just 1/6 :)

Answer 15

ok thank you so much!

Answer 16

youre welcome

Answer 17

@amistre64 i have a few more problems like this one but just have one question. how do you find the upper and lower limits?

Answer 18

given to function, f and g, the points of intersection are every point they have in common:

f=g, as such we can determine the values of f-g=0 to be points of interest.