Which expression is modeled by this arrangement of tiles? 30 positive tiles are divided into 3 sets of 10 positive tiles. 30 divided by (negative 30) 30 divided by (negative 3) 30 divided by 3 30 divided by 30

In factoring by grouping, what would you have for step 3 for the following? step 1: x^3 +5x^2 +4x+20 step 2: x^2 (x+5)+4(x+5) step 3: ?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?