I believe it's A, C and D.
Answer:
$9.66 isb15% of $64.40
Step-by-step explanation:
64.40×15%
the assumption being that the first machine is the one on the left-hand-side and the second is the one on the right-hand-side.
the input goes to the 1st machine and the output of that goes to the 2nd machine.
a)
if she uses and input of 6 on the 2nd one, the result will be 6² - 6 = 30, if we feed that to the 1st one the result will be √( 30 - 5) = √25 = 5, so, simply having the machines swap places will work to get a final output of 5.
b)
clearly we can never get an output of -5 from a square root, however we can from the quadratic one, the 2nd machine/equation.
let's check something, we need a -5 on the 2nd, so

so if we use a "1" as the output on the first machine, we should be able to find out what input we need, let's do that.

so if we use an input of 6 on the first machine, we should be able to get a -5 as final output from the 2nd machine.

Answer:
T
Step-by-step explanation:
(x-10)^2=(x-10)(x-10)=(x^2-10x-10x+100)=x^2-20x+100
Answer:
1= 4x^2
2= 5b^4
3= 3u^2v^2w
4= 7
5= bc^3d^6
Note: ^ stands for exponents