Simplify 4 - 8 / 2 + 3

1) 4−8÷2+3

when we simplify this first we solve for division

4 - (8÷2) + 3

= 4 - (4) + 3

=3 

the Answer is 3

2) [(1+5)·2−5]·2

= [(6) x 2 - 5] x 2

= [12 -5 ] x 2

= 7 x 2

= 14

the answer is 14

3) (1/2)2−6(2−2/3)

2 in 1/2 is cancelled with 2 and for the bracket (2-2/3), multiply 2 and 2/3 with 3 we get 6-2

= 2 - 6 (6 - 2)

= 2- 6 (4)

= 2 - 24

= -22

the answer is -22

4) 4−16÷4+4^2

= 4 - (16 / 4) +4²

= 4 - (4) + 16

= 16

the answer is 16

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

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