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.

So the first evening he received 15 calls, the second he received 21 and the third one he received 45.
Hello,
For this, you'll wanna do the following...
7d = 1,298.50...now divide both sides by 7...
That should leave you with Joe making 185.50$ a day over the week. Not to bad I say aha.
Answer:
Step-by-step explanation:
We can use distance formula and find the length of AB , BC, CD and DA.
Then using this length we can prove that AB = CD and BC = DA
First, divide the shape into two figures ( a semicircle and a rectangle)
Then, find the are or the two shapes using the area formula for a semicircle (

) and the are formula for a rectangle (base x height)
Finally, add the two areas together and you have your answer