Question

I want step by step explanation
in a copy

okkk ​

Answer 1

Answer:

10^-y = ±1/5

Step-by-step explanation:

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

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

Take the square root,

${10}^{y} = \sqrt{25}$

${10}^{y} = ±5$

$\frac{1}{{10}^{y}} = ± \frac{1}{5}$

${10}^{ - y} = ±\frac{1}{5}$

Answer 2

Answer:

See the attachment.

The problem was of class 7 as I read in class 7.