Explain how place value could be used to find the difference of 4.23 and 2.75

Which graph shows a function with a range of all real numbers greater than or equal to -1

Which points are solutions to the linear inequality y < 0.5x + 2? check all that apply. (–3, –2) (–2, 1) (–1, –2) (–1, 2) (1, –2) (1, 2)

Can someone me do math because i am having a breakdown rn because i don’t get it