1.

Unrgent ppplllss help

Answer» 14) 7 / 15 = 0.46

15) \: \: 1 \div (7 + <klux>3</klux> \sqrt{2} )


= (7 - 3 \sqrt{2} ) \div (7 + 3 \sqrt{2} )(7 - 3 \sqrt{2} )


= 7 - 3 \sqrt{2} \div 49 - 18

= 7 - 3 \sqrt{2} \div 31


16) (p/q)x + a - b =0

x = b -a is the zero


17) \: \: \: \: (625) {}^{ - 1 \div 4}


= \: \: (5) {}^{4} \times ( - 1 \div 4)

= \: \: \: 5 {}^{ - 1}

= 1 / 5


ii) \: \: \: \: 5 \sqrt{(32) {}^{3} }


(32) {}^{3 \div 5}

2 {}^{5 \times (3 \div 5)}

2 {}^{3} = 8

19) 5/7 and 9 /11

= (5×11) / (7×11) = 55/77

= (9 × 7) / (11 × 7) = 63 / 77

3 Rational no between

55 / 77 , 56 / 77 , 57 / 77 , 58 / 77 , 63 / 77


Thanks


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