Please does anyone know the answer to 5^(2m-1)=1/625

1/625 0r 0.0016 is the product of the given expression.

Step-by-step explanation:

Step-by-step explanation:

Here, The given expression, 5^{-1} / times 5^-3

We can write, 5^-1 / times 5^-3=/frac{5^{-1}}{5^3} (because we can write a^m=1/a^{-m})

⇒5^-1 / times 5^-3=/frac{1}{5^1/times 5^3}

⇒5^-1 / times 5^-3=/frac{1}{5^{1+3}} (because a^m/times a^n=a^{m+n})

⇒5^-1 / times 5^-3=/frac{1}{5^{4}}

⇒5^-1 / times 5^-3=/frac{1}{625}=0.0016

b i think

step-by-step explanation:

not really sure

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18