Question

unrgent ppplllss help

Answer 1

14) 7 / 15 = 0.46

$15) \: \: 1 \div (7 + 3 \sqrt{2} )$


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


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

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


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