Isabelle is going to rewrite each subtraction statement as an addition statement by "adding the opposite". She has completed the first
statement so far. Help her represent the remaining subtraction statements as addition statements.
b.2-(-19)
c. -28 - 10
d. - 15 - (-7)
e. 35 - 12
a. -5 - 12
-5 + (-12)

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Could somebody me with this radical simplification?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.