Answer:
C
Step-by-step explanation:
=1/7 X 100
=14.3
I hope this helps a bit
Answer:
2
Step-by-step explanation:
2 is the slope of y=2x+3 and any line parralel would have the same slope. therefore the parallel slope would be 2
Let t and s represent the masses of 20% and 60% alloys respectively.
t+s=80, s=80-t
(0.2t+0.6s)/80=0.52 multiply both sides by 80
0.2t+0.6s=41.6, now using s=80-t in this equation gives us:
0.2t+0.6(80-t)=41.6 perform indicated multiplication on left side
0.2t+48-0.6t=41.6 combine like terms on left side
-0.4t+48=41.6 subtract 48 from both sides
-0.4t=-6.4 divide both sides by -0.4
t=16, since s=80-t
s=64
So 16kg of 20% alloy is mixed with 64kg of 60% allow to make 80kg of a 52% alloy.
Answer:
The correct options are 1, 2, 4 and 6.
Step-by-step explanation:
The given expression is

To subtract like term subtract like terms, subtract the coefficients, not the variables.
Therefore option 1 is correct.
Like terms are terms that contain the same variable, raised to the same power. For example: 3xy and 5xy, 4x² and 3x².
Therefore, option 2 is correct.
Using distributive property we get


Only combine terms which contain the same variable.
Therefore option 4 is correct.


The simplified expression is -4x-3y+3z. Therefore option 6 is correct.