Answer:
First: 15
Second: 21
Third: 45
Step-by-step explanation:
In order to create the equation we need to represent the evenings with an alebraic term, in thsi case we are going to represent the second evening with an X
Second evening:x
The first night she got 6 fewer calls than the second: Second-6=x-6
The third night she received 3 times the first: 3(first night)=3(x-6)
The equation is First Night plus second night plus third night equals 81.
![First+second+third=81\\x+(x-7)+3(x-6)=81\\x+x-7+3x-18=81\\5x=81+21+6\\5x=105\\x=\frac{105}{5} \\x=21](https://tex.z-dn.net/?f=First%2Bsecond%2Bthird%3D81%5C%5Cx%2B%28x-7%29%2B3%28x-6%29%3D81%5C%5Cx%2Bx-7%2B3x-18%3D81%5C%5C5x%3D81%2B21%2B6%5C%5C5x%3D105%5C%5Cx%3D%5Cfrac%7B105%7D%7B5%7D%20%5C%5Cx%3D21)
So the first evening he received 15 calls, the second he received 21 and the third one he received 45.
The results of the experiment are shown in the frequency side
a) 14
b) 3600 Best guess 300*12
Answer:
what graph
Step-by-step explanation:
Answer:
your answer is 12 units
Step-by-step explanation:
I hope it helps