Astudent is asked to calculate the value of 212 − 132 using the identity x2 − y2 = (x − y)(x + y). the student's steps are shown below. step 1: 212 − 132 = (a − b)(a + b) step 2: = (c)(d) step 3: = (8)(30) + 8(4) step 4: = 240 + 32 step 5: = 272 what are the values of a, b, c, and d?

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

25 ! i need asap! ! ill mark brainliest!