Question

Can anyone help me to solve this question which i marked but please explain it as well.​

Answer 1

23

${10}^{2y} = 25 \\ \sqrt{ {10}^{2y} } = 5 \\ {10}^{y} = 5 \\ {10}^{ - y} = \frac{1}{5}$

24

${9}^{x + 2} = 240 + {9}^{x} \\ {9}^{x} \times {9}^{2} = 240 + {9}^{x} \\ 9 ^{x} (81 - 1) = 240 \\ {9}^{x } = 3 \\ x =0.5$

26

$\frac{x}{ {x}^{1.5} } = {8x}^{ - 1} \\ \frac{ {x}^{2 } }{x ^{1.5} } = 8 \\ {x}^{0.5} = 8 \\ x = 64$

Answer 2

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