Yes the ones that you did are correct
Answer:
10 hours
Step-by-step explanation:
Find the unit rate by dividing kilograms/hours. 16 kilograms in 8 hours is 16/8=2 kg per hour. If 20 kilograms, then divide 20 by the unit rate 2.
20kg/2kg per hour = 10 hours
Answer:
x=2
Step-by-step explanation:
5 ( x - 2) + 4 ( 3 + x) = 20
Distribute
5x -10 +12 +4x = 20
Combine like terms
9x +2 = 20
Subtract 2 from each side
9x+2-2 = 20-2
9x = 18
Divide each side by 9
9x/9 = 18/9
x = 2
X=2
y=149
————-
Solve 8x+15=7x+17
alternate angles are equal
x=2
Substitute 2 in 8x+15 =31
180-31=149
y=149
Angles on a straight line add up to 180
Y=4x+6 is x=-3/2 Y=2x is x=0
