Subtract 4 from both sides. You'll get 8x = 28. Solving for x, x = 28/8 = 7/2
The answer is 2/(15*0.8) hours = 2/12 hours
= (2/12)*60 mins [ 1 hour = 60 mins]
= 10 mins
Answer:
u just expand the brackets out and make a linear equation to solve from there
Step-by-step explanation:
Answer: 3x+8y=100
x+y=20
x=12
y=8
Step-by-step explanation: x would represent the number of multiple choice questions and y would represent the number of short response questions. the multiple choice questions were 3 points meaning that you need to find x. the short answer response questions were 8 points meaning you need to find y. altogether you need to get 100 points. for the second equation you have 20 questions that need to be both multiple choice and short response. therefore the second equation would be x+y=20. if you solved this, the answer would be that x equals 12 and y equals 8. hope this helped! :))
If you simplify each side of the equation you get this y= -4 - 3x/5
