mr. kendall has a rectangular classroom that measures 21 feet long by 18 feet wide. he will be moving to a new classroom that is 4 feet longer and 3 feet wider. how much more area, in square feet will mr. kendall have in his new classroom

Explain how you can use the associative property to evaluate (7x50)x4.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Juliana says that she can use the patterns of equivalent ratios in the multiplication table below to write an infinite number of ratios that are equivalent to 6: 10. which statement explains whether juliana is correct? she is correct because she can multiply 6 and 10 by any number to form an equivalent ratio. she is correct because 6: 10 can be written as 1: 2 and there are an infinite number of ratios for 1: 2. she is not correct because the multiplication table does not include multiples of 10. she is not correct because 6: 10 is equivalent to 3: 5 and there are only 9 ratios in the multiplication table that are equivalent to 3: 5.