31) x = 25 degrees
Equation: (2x+15) + x + 90 = 180 degrees
--> 3x+105 = 180
-------> 3x = 75
-------------> x = 25 degrees
32) x = 17 degrees
Equation: (x+52) + (3x+21) + 39 = 180 degrees
--> 4x+112 = 180
-------> 4x = 68
-------------> x = 17 degrees
1 hour each day is used for test
so 8-1=7 used per day
so commercial is 1 in the 4:2:1 so
4+2+1=7
ok, so 7 units, 7 hours
4 hour for private
2 hour for research
1 hour of commerical
4*5=20=private
2*15=30=research
1*4=40=commercial
20+30+40=90
percent from commercial
40/90=0.44444444444≈44.44% about 44%
Answer:
E
Step-by-step explanation:
there are 5 red boxes and 7 blue boxes
Answer: 1. 3x=15. 2. is correct
3. X=15
740% written as a decimal is 7.4 as a mixed number it would be 7 4/10 or simplified it would be 7 2/5