The same rule is used for addition/subtraction. answer each question below.
-13 + 4 - 18 =
) +(-6) =

Step-by-step explanation:

Use PEMDAS:

PParentheses first

EExponents (ie Powers and Square Roots, etc.)

MDMultiplication and Division (left-to-right)

AS Addition and Subtraction (left-to-right)

and

(-)(-) = (+), (-)(+) = (+)(-) = (-), (+)(+) = (+)

-13 + 4 - 18 = (-13 + 4) - 18 = -9 - 18 = -27

12 - (-9) + (-6) = 12 + 9 - 6 = 21 - 6 = 15

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

one of each metals

step-by-step explanation: