Astore has a sale for 3 and 10 off gloves. write 3 and 10 as a decimal

Three times the sum of a number and seven is negative thirty-six. what is the number?

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?

Ahmed plans to add a rectangular sunroom to his house. the sunroom will have a length of 14 feet and a width of 10 feet, and the construction will cost $40 per square foot. how much more would the sunroom cost if it’s width were increased to 12 feet?