I believe it is 3x+21 but i could be wrong :/ my explaination is -3 • -X would be +3x because it was distributed and -3 • -7 would be +21
Answer:
mean= 90
Step-by-step explanation:
The mean is the terms added together, then divided by the number of terms (in this case, 8):

Done.
Answer:
B
Step-by-step explanation:
Diagonals in a kite are perpendicular. I just learned this. Mark Brainliest if you get it right!!!
6-3/4x+1/3=1/2x+5
6+1/3-5=1/2x+3/4x
4/3=5/4x
x=16/15
The zeros are at -3, 1 and 3