Ziad tells his son Marc: " This year my age is triple yours, but in 10 years, it will be the double". Find their ages.

You click on it and type

Idon't see any answer choices for your question, but the answer would to highlight the box, and drag the box to the box of choice (or do a simple copy and paste, and delete the old data).

Function tipcalculate (slider, bill){  var tip = document.getelementbyid('tipamount');   var slideval = document.getelementbyid('slideval');   var bill = document.getelementbyid(bill).value;   var prcnt = slider * .01;       if (bill == null || bill == '') {      tip.innerhtml = ' enter an amount';       return false;   }  if(isnan(bill)) {      tip.innerhtml = ' enter a number';       return false;   }  if(bill > = 0){      tip.innerhtml = '$' + (bill * prcnt) .tofixed(2);   slideval.innerhtml = slider + '%';   }}

My best guess would be b.hope this !