Stevie has 25marbles
Freddie's has 25x2:50marbles
Danny has 50+5:55marbles
When a decimal is multiplied to a power, it decreases exponentially. Therefore, y=3(0.2)^x does NOT represent exponential growth.
When you are trying to figure this out put them into a list vertically. Remember, ONE X CAN'T HAVE TO Y's BUT ONE Y CAN HAVE MULTIPLE X's, But dont worry about the y's right now. Lets focus on the x's.
Ask yourself, Are there 2 or more x's that are the same value?
Yes) Continue to next step
No) It's a function :)
If there are 2 or more of the same x value, ask your self now if those x's have different y Values.
Yes) It is not a function, one x can not have more that 1 y value
No) Its a function :)
-$1240/4 months= -$310/month
A=LW, and we are told that L=W+10
Using L=W+10 in A=LW you have:
A=(W+10)W
A=W^2+10W
W^2+10W=880, we are told that A=880 so
W^2+10W=880 now we can complete the square...
W^2+10W+25=905
(W+5)^2=905
W+5=±√905
W=-5±√905, since W>0
W=-5+√905 and since L=W+10
L=5+√905
W=-5+√905 ft and L=5+√905 ft
If we want an approximation:
W≈25.08 ft and L≈35.08 ft (both dimensions to the nearest hundredth)
