The sum of the ages of John Ciara is 96 years and 8years ago John’s age is three times Sierra‘s age how old is John now

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?

2x minus y equals 6, x plus y equals negative 3

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out