Question

if you can I will follow you and make brainlist.. but don't do scam
I will immediately report​

Answer 1

Answer:

(a)-1/5

Step-by-step explanation:

10^2y=25

10^-y=-1/5

you have to follow me frd

Answer 2

Answer:

${10}^{2y} = 25$

$then \: we \: can \: write \: {10 }^{2y} \: as \: {10}^{2} \times {10}^{y}$

${10}^{2} = 100$

${10}^{2} \times {10}^{y} = 25$

$100 \times {10}^{y} = 25$

${10}^{y} = \frac{25}{100}$

${10}^{y} = \frac{1}{4}$

$reciprocaling \: on \: both \: sides$

$we \: get$

$\frac{1}{ {10}^{y} } = 4$

$\frac{1}{ {a}^{n} } = {a}^{ - n}$

$therefore$

$\frac{1}{ {10}^{y} } = {10}^{ - y}$

${10}^{ - y} = 4$