28. 6x+42-20=6x
42-20=0
42-20 gives you 22
22=0
Statement is false
30. -2x-4=-2x-3-1
-2x-4=-2x-4
Statement is true because both sides are identical
32. 2x+8-5=2x+3
8-5=3
3=3
Statement is true for any value of x
34. 3x+(x+4)=18
3x+x+4=18
4x+4=18
4x=18-4
4x=14 (next divide both sides by 4)
x= 7 over 2
7/2
Answer:
k = 3
Step-by-step explanation:
Given that y and x are directly related then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 81 when x = 27
k = 
= 
= 3
Answer:
utrtttfdgtt
Step-by-step explanation:
Answer:
44.59
Step-by-step explanation:
49.92*2 = 49.96/2 = 124.90
Tax on that is 124.90*1.071 = 133.7679
Divide that 3 to get average mean cost
133.7679/3 = 44.589
round to 44.59
Answer: yes!!!!!!!!!
Step-by-step explanation:
