Use pythagorean theorem
a^2 + b^2 = c^2
fill in known values
12^2+9^2 =c^2
simplify
144 + 81 = c^2
225 =c^2
square both sides
15 = c= hypotenuse
-56z+28? 56+28= 84 so your answer is d
Answer:
-10
Step-by-step explanation:
3j-4j=10
-j=10
j=-10
Hope it helps!
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Rotate once to the left side
You use parenthesis first, then brackets. Braces are not always used. They can be used for function notation.