The average height of 8 adults is 1.8 m. what is the sum of their heights? how do i work this out without a calculator?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Which of the following parabolas opens up?

Catherine saved some money and plans to add the same amount each week to her savings account. the table represents the number of weeks that she will save, x, and the total amount of money that she will have in her account, y. weeks, x dollars in account, y 4 74 6 86 9 104 11 116 which linear equation represents catherine’s situation?