Question

If 102y = 25, then 10-y equals:

(a) -1/5, (b) 1/625, (c) 1/50, (d) 1/25, (e) 1/5

Answer 1

ǫᴜᴇsᴛɪᴏɴ

ɪғ 102ʏ = 25, ᴛʜᴇɴ 10-ʏ ᴇǫᴜᴀʟs:

(ᴀ) -1/5, (ʙ) 1/625, (ᴄ) 1/50, (ᴅ) 1/25, (ᴇ) 1/5

ᴀɴsᴡᴇʀ

=${10}^{2y}$

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

=${10}^{y} = 5$

= 1/10y = 1/5

= ${10}^{-y}$= 1/5

ʜᴇɴᴄᴇ ᴏᴘᴛɪᴏɴ ᴄ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ

Answer 2

Answer:

25/102-1020/102

25-1020/102

995/102