Answer:
sorry but I don't know the answer
(C) its answer C because you add them all together and then take a percentage
Hey there!
To find this, we should figure out what 1/18 can be multiplied by to get 5/6, because when we end up adding them together after multiplying, 5/6x - 5/6x eliminates x.
One thing that would make this easier is to make 1/18 and 5/6 have the same denominator.
6 goes into 18 3 times, so what we could do is multiply both the numerator and denominator of 5/6 by 3.
That gives us 15/18.
Now that we have the denominators the same, we can see that 1/18 goes into 15/18 15 times by comparing the numerators.
This means the first equation should be multiplied by 15.
Hope this helps!
No 7/8 is lager then 2/3.
2/3 = 0.6666
7/8= 0.87..
X = 1st evening, y = 2nd evening, z = 3rd evening
x + y + z = 83
x = z + 7
y = 2z
z + 7 + 2z + z = 83
4z + 7 = 83
4z = 83 - 7
4z = 76
z = 76/4
z = 19 <=== 3rd evening calls
x = z + 7
x = 19 + 7
x = 26 <=== 1st evening calls
y = 2z
y = 2(19)
y = 38 <=== 2nd evening calls