Tamara rewrote the expression 0.2(4+1.4y-2.1). Her steps are shown. Step 1: 0.2(4+1.4y - 2.1)
Step 2: 4.2+1.6y - 1.9
Step 3: 4.2-1.9+1.6y
Step 4: 2.3+1.6y
Which statement identifies and explains the first mistake Tamara made?

What properties allow transformation to be used as a problem solving tool

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)