All 100 targets have a solution.
\(1 = 47^{9 - 9 }\)
\(2 = 9 - \frac{ 49 }{ 7 }\)
\(3 = 97 - 94 \)
\(4 = \frac{ 49 }{ 7 } - \sqrt{9 }\)
\(5 = \sqrt{99 - 74 }\)
\(6 = ( 97 - 94 )!\)
\(7 = 9 \cdot 9 - 74 \)
\(8 = 9 - \frac{ \sqrt{49} }{ 7 }\)
\(9 = \frac{ 99 }{ 4 + 7 }\)
\(10 = \frac{ \sqrt{49} }{ 7 } + 9 \)
\(11 = \frac{ 97 + \sqrt{4} }{ 9 }\)
\(12 = \frac{ 9 }{ 7 - 4 } + 9 \)
\(13 = \frac{ 94 - \sqrt{9} }{ 7 }\)
\(14 = 7 \cdot 9 - 49 \)
\(15 = 94 - 79 \)
\(16 = \frac{ 49 }{ 7 } + 9 \)
\(17 = ( 9 - 7 ) \cdot 4 + 9 \)
\(18 = ( 4 + 7 - 9 ) \cdot 9 \)
\(19 = \frac{ 79 - \sqrt{9} }{ 4 }\)
\(20 = 47 - \sqrt{9} \cdot 9 \)
\(21 = \frac{ 49 }{ 7 } \cdot \sqrt{9 }\)
\(22 = \frac{ 79 + 9 }{ 4 }\)
\(23 = \frac{ 99 - 7 }{ 4 }\)
\(24 = ( 7 - \frac{ 9 }{ 9 } ) \cdot 4 \)
\(25 = 99 - 74 \)
\(26 = ( 9 - 4 ) \cdot 7 - 9 \)
\(27 = \frac{ 9 }{ 7 - 4 } \cdot 9 \)
\(28 = \sqrt{49 \cdot 9} + 7 \)
\(29 = 47 - 9 - 9 \)
\(30 = 79 - 49 \)
\(31 = 94 - 7 \cdot 9 \)
\(32 = ( \frac{ 9 }{ 9 } + 7 ) \cdot 4 \)
\(33 = 49 - 7 - 9 \)
\(34 = 9 \cdot 9 - 47 \)
\(35 = 47 - 9 - \sqrt{9 }\)
\(36 = \frac{ 7 + 9 }{ 4 } \cdot 9 \)
\(37 = \frac{ 9 \cdot 9 - 7 }{ \sqrt{4 } }\)
\(38 = 47 - \sqrt{9 \cdot 9 }\)
\(39 = 49 - 7 - \sqrt{9 }\)
\(40 = \sqrt{49} \cdot 7 - 9 \)
\(41 = 47 - 9 + \sqrt{9 }\)
\(42 = \frac{ 49 }{ 7 } \cdot \sqrt{9 }!\)
\(43 = 79 - 4 \cdot 9 \)
\(44 = 47 - \frac{ 9 }{ \sqrt{9 } }\)
\(45 = 49 - 7 + \sqrt{9 }\)
\(46 = 47 - \frac{ 9 }{ 9 }\)
\(47 = 47 - 9 + 9 \)
\(48 = 97 - 49 \)
\(49 = 7^{9 - \sqrt{49 }}\)
\(50 = \frac{ 9 }{ \sqrt{9} } + 47 \)
\(51 = 49 - 7 + 9 \)
\(52 = 99 - 47 \)
\(53 = 47 - \sqrt{9} + 9 \)
\(54 = ( 9 - ( 7 - 4 ) ) \cdot 9 \)
\(55 = ( 7 + 9 ) \cdot 4 - 9 \)
\(56 = 74 - 9 - 9 \)
\(57 = ( 4 \cdot 7 - 9 ) \cdot \sqrt{9 }\)
\(58 = \sqrt{49} \cdot 7 + 9 \)
\(59 = 47 + \sqrt{9} + 9 \)
\(60 = ( 4 + 7 + 9 ) \cdot \sqrt{9 }\)
\(61 = 97 - 4 \cdot 9 \)
\(62 = 74 - 9 - \sqrt{9 }\)
\(63 = \frac{ 49 }{ 7 } \cdot 9 \)
\(64 = 79 - 4! + 9 \)
\(65 = 47 + 9 + 9 \)
\(66 = 79 - 4 - 9 \)
\(67 = 79 - 4 \cdot \sqrt{9 }\)
\(68 = 74 - 9 + \sqrt{9 }\)
\(69 = 4! \cdot 7 - 99 \)
\(70 = \sqrt{49} \cdot 9 + 7 \)
\(71 = 99 - 4 \cdot 7 \)
\(72 = 79 - \sqrt{49 }\)
\(73 = 74 - \frac{ 9 }{ 9 }\)
\(74 = 74 - 9 + 9 \)
\(75 = \frac{ 9 }{ 9 } + 74 \)
\(76 = 7 \cdot 9 + 4 + 9 \)
\(77 = \frac{ 9 }{ \sqrt{9} } + 74 \)
\(78 = 94 - 7 - 9 \)
\(79 = ( 4 - \sqrt{9} ) \cdot 79 \)
\(80 = 74 - \sqrt{9} + 9 \)
\(81 = 9^{4 + 7 - 9 }\)
\(82 = 97 - 4! + 9 \)
\(83 = \sqrt{9 \cdot 9} + 74 \)
\(84 = 79 - 4 + 9 \)
\(85 = \sqrt{4 \cdot 9} + 79 \)
\(86 = \sqrt{49} + 79 \)
\(87 = \sqrt{4}^{\sqrt{9}} + 79 \)
\(88 = 99 - 4 - 7 \)
\(89 = 74 + \sqrt{9}! + 9 \)
\(90 = 97 - \sqrt{49 }\)
\(91 = 4 \cdot \sqrt{9} + 79 \)
\(92 = 74 + 9 + 9 \)
\(93 = 99 - ( 7 - 4 )!\)
\(94 = 79 + 4! - 9 \)
\(95 = 94 + 7 - \sqrt{9 }!\)
\(96 = 94 - 7 + 9 \)
\(97 = \sqrt{4} \cdot 9 + 79 \)
\(98 = ( 9 - 7 ) \cdot 49 \)
\(99 = 4 \cdot 9 + 7 \cdot 9 \)
\(100 = ( 4 + 9 ) \cdot 7 + 9 \)