Length AC
A(-3,-3), C(3,2)
d= (3-(-3))^2 + (2-(-3))^2
d= (6)^2 + (5)^2
d= 36+ 25
Square root 61 = 7.8
Length AC = 7.8
Length BC
B(1,-2) , C(3,2)
d= (3-1)^2 + (2-(-2))^2
d= (2)^2 + (4)^2
d= 4+ 16
Square root 20 = 4.5
Length BC= 4.5
Hope this helps!
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On simplifying the expression 13.8+ (-11.5) , we get 2.3 . And additions
13.8 + (-11.5) and (-13.8) + 11.5 are numbers will same value and opposite sign.
<h3>What are rules for adding a positive and a negative number?</h3>
For adding a negative and a positive number, use the sign of the larger number and subtract.
For example: (–8) + 2 = -6
Given that we have to solve 13.8 + (-11.5) = 13.8-11.5 (we subtract smaller no from larger and will use the sign of lager number that is + here)
13.8+(-11.5) = 13.8-11.5 =2.3
13.8+(-11.5) simply means that 13.8 -11.5 which is subtraction of 11.5 from 13.8
but (-13.8) + 11.5 = -13.8 +11.5 = -( 13.8 -11.5) [taking -1 common from the expression]
Therefore , -13.8 + 11.5 has same value as 13.8- 11.5 but opposite in sign.
Learn, More about addition of numbers from here:'
brainly.com/question/14092461
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