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...'s weight = 2( 50 )+8 = 108 kg 2. Let Peter get $y, then Jack gets $(y+40) and Tom gets $(y+250). <= y+40+210...
a) let the number of $1 coins be x , $2 coins be y and $5 coins be z , { z = x + 2 ----( 1 ) y = 2( x ) +5 ----( 2 ) since Mary has 91 coins altogether therefore , x + y + z = 91 ----( 3 ) sub ( 1 ) and ( 2 ) into ( 3 ), x + 2( x ) + 5 + x + 2 = 91...
我唔識做第一條呀..不過我識做其他既題目,希望可以幫到你啦~ 2a) 20+x<= 50 20(3)+ 2x≥90---> 60+ 2x≥90 2bi)60+ 2x≥90 2x≥30 x≥15 Therefore, at least 15 unskilled workers should be employed. bii)the least total daily...
... the eauation, we have: x = 16 or -3 (rejected) So the price Jack sold each calculator is 2400/16 + 50 = $200
let x be the number of rounds that Tim won 4x-1(15-x)<30 Jack at least won 6 rounds
... 8. Therefore, the least number of rounds that Jack won = 15-8 =7 nos. of rounds If the question ...
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