Ricky took the sat math test four times the first three scores total 1900 after the 4th time is average score with 650 what score did he get the 4th time

Ricky scored 700 points the 4th time.

Step-by-step explanation:

By definition the average formula is:

where x are the samples of the data set and n the numbers of elements in the set.

In this case:

n = 4average = 650x₁ + x₂ + x₃ = 1900

Replacing the data on the general formula:

//multiply both sides of the equation by 4.

//substract 1900 in both sides of the equation.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle