Answer:
Increase by 8.75
Step-by-step explanation:
75+82+67+72=296
296/4= 74
74 = Original Mean
75+82+96+78=331
New mean 82.75
82.75-74=8.75
Answer:C
180-(60+40)=80°
C=80°
20/sin80. =a/sin40
a=(20sin40)÷sin80
=13.1
x= 1 thì f(x) = -11ep-by-step explanationábdkjakdkasd :
5x280=1400
$1400
if he works on the weekends then add 580
s0 $1980