Answer:
30
Step-by-step explanation:
because in order for something to double you need it times 2 or add itself together like 30+30 is 60 and that just doubled the original number 30
21 k^9
(3k^4) (7k^5)
Multiply the coefficients
3*7 = 21
Add the exponents
k^(4+5) = k^(9)
Put back together
The answer would be:
x= 25
a²+b²=c²
24²+7²=c²
576+49= 625
√625= 25
