4n+78n-3/4=942
l
82n - 3/4=942
+3/4 +3/4(.75)
82n=942.75
divide 82 by both sides
n = 11.49 or 11.5
AAnswer:
Step-by-step explanation:
Answer:
a) 
b) 
c) 
d) E(3X + 2) = 21.35
e) 
f) V(3X+2) = 140.832
g) E(X+1) = 7.45
h) V(X+1) = 15.648
Step-by-step explanation:
a) 

b)

c)

d)

e)

f)

g)

h)

Answer:
18
Step-by-step explanation:
54/18=3
72/18=4
90/18=5
Answer:
x<15, probably
Step-by-step explanation:
maybe multiply 2 to each side to eliminate the fraction. so 3x+15<60. subtract 15 to isolate the variable term so 3x<45. divide by 3 to isolate x so x<15. check the work. is the inequality true for all values of x less than 15? let's try the first possible integer value, 14, to be sure. 3(14)+15= 57. so 57/2<30. now 57/2 is 28.5 and 28.5<30 so it seems right