Evaluate each expression if a =2, b = -3 and c = -1 and d =4. 2cd+3ab

Here,

a=2

b=-3

c=-1

d=4

Now,

2cd+3ab

=2×(-1)×4+3×2×(-3)

=-8+(-18)

=-8-26

=-26

5050

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the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: