Answer:
Step-by-step explanation:
y=-1 ans.
x=2*-1=3
x=-2+3
x=1 ans.
Proof:
4*1-5*-1=9
4+5=9
9=9
Just divide 28 by 15
and you get
1.866666666666667
Answer:
Step-by-step explanation:
Not entirely sure about the first one, but I'll try the others:
2- log base 8 (8x) = log base 8 (8) + log base 8 (x) = 1 + log base 8 (x)
3 - log base 3 (5^x) = x log base 3 (5)
4 - log base 2 (5/x) = log base 2 (5) - log base 2 (x) = In 5 - In x
5 - log base 2 (2^x) = x log base 2 (2) = x · 1 = x