What type of validity evidence is provided by examining the difference among groups that you predict should differ on the test?

Which of the following expressions is equal to 2x^2+8

Multiply. write your answer in simplest form. 3/8 x 5/7

Michelle is planting flowers in her garden. she wants the ratio of daises to carnations to be 3 to 2. michelle wants to plant a total of 35 flowers. how many daises should she plant?