Answer:
Step-by-step explanation:
Given the expression 
, to evaluate this, we will use one of the law of indices as shown;
Mario's error was that she did not raise the value of 4 to the power of -3. She only raised z^8 to the power of -3 when it is supposed to affect both 4 and z^8
Answer:
-27
Step-by-step explanation:
(-243)^3/5
We know that a^b^c = a^ (b*c)
(-243) ^ 1/5 ^3
We know (-243) ^ 1/5 = -3
(-3) ^3 = -27
Answer:
9/20 = 0.45
Step-by-step explanation:
Answer:
Here are your answers! :)
Step-by-step explanation:
15) -21
16) -11
17) 26
18) 23
19) -32
20) -20
21) 65
22) 420
23) 16
24) -13
25) 20
(I hope this helps!!)
Lets use substitution
y=7x-10
y=-3
so
-3=7x-10
7=7x
1=x
now lets check
y=7(1)-10
y=-3
therefore both equations have the same value
