Question

can you guys help me too solve this all question please

class 9 math

Answer 1

Answer:

Here is your solution.. Thanks

Answer 2

Answer:

$a. \\ {2}^{20} = {2}^{5x } \\ 20 = 5x \\ x = 4 \\ b. \\ {5}^{x} = ({5}^{4} )(5 ^{4} ) \\ {5}^{x} = {5}^{8} \\ x = 8 \\c. \\ {4}^{9} = {64}^{x} \\ {4}^{9} =( {4} ^{3} )^{x} \\ {4}^{9} = {4} ^{3x} \\ 3x = 9 \\ x = 3 \\ d. \\ ( \frac{2}{3} )^{2} \times 9 = {2}^{n} \\ \frac{4}{9} \times 9 = {2}^{n} \\ 4 = {2}^{n} \\ {2}^{2} = {2}^{n} \\ n = 2$