Frank bought 6 pens and 3 highlighters in the school store and paid $21 for the whole purchase. His friend , Andy paid $19 for 2 p

Question

Frank bought 6 pens and 3 highlighters in the school store and paid $21 for the whole purchase. His friend , Andy paid $19 for 2 pens and 4 highlighters. If all pens cost the same and all highlighter cost the same, what is the price of one pen?

kiet · Answer

The  price  of one  pen  will be  $1.5  and one highlighter is  $4.     What is an expression?     Expression  in maths is defined as the  collection  of the numbers variables and  functions  by using signs like  addition , subtraction,  multiplication  and division.     Given that:-     Frank  bought  6 pens  and  3 highlighter s in the school  store  and paid  $21 f or the whole  purchase .  His  friend , Andy paid  $19  for  2 pens a nd  4 highlighters.    The  cost  of the pen and the  highlighter  will be calculated by  forming  the two  expressions  from the given data in the  question  the expressions are as follows:-    6p  +  3h  = 21  2p  +  4 h = 19     Solving  the above linear  equations  by elimination  method :-    ( 6p  +  3h  = 21 ) x 2   ( 2p  +  4 h = 19 ) x 6    The new  equations  are:-    12p  + 6h  =  42  12p  + 24h  = 114     Substracting  the below equation from the  above  equation we will  get :-    6h - 24h  =  -72  -18 h = -72   h  =  $4     Put the  value  of  h  in any of the  above  equations:-    2p  +  4 h = 19  2p  +  4 ( 4 )  = 19  2p  +  16  =  19  p  =  3 / 2   P  = $1.5     Therefore the  price  of one  pen  will be  $1.5  and one highlighter is  $4.     To know more about  Expression  follow  https://brainly.com/question/723406  #SPJ1

What is an expression?

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