Answer: The total cost in dollars of the gas is $77.80.
Step-by-step explanation:
since we have given that
Amount of gallon of gas he bought for the first time = 12.53
Amount of gallon of gas he bought for the second time = 11.86
According to question, He paid $3.19 per gallon both the times that he stopped for gas on a weekend trip.
So, our expression that shows the total cost in dollars of the gas he bought on this trip is given by
Hence, the total cost in dollars of the gas is $77.80.
Answer:
c.
Step-by-step explanation:
it's been a while since I've done this but I'm about 90% sure
The scale has two sides:
The Left Hand Side (LHS) and the Right Hand Side (RHS).
Let the weight of the sphere be represented as s
Let the weight of the cube be represented as c
Let the LHS have the 5 spheres and 1 cube, represented as = (5s + 1c)
Let the RHS have the 2 spheres and 3 cubes, represented as = (2s + 3c)
If the cube c, weighs 150 gram, c = 150g
Since the scale is balanced, therefore the weights on the LHS would be equal to the weights on the RHS.
Therefore: (5s + 1c) = (2s + 3c), c = 150.
(5s + 1*150) = (2s + 3*150)
(5s + 150) = (2s + 450) collect like terms.
5s - 2s = 450 - 150
3s = 300 Divide both sides by 3
s = 300/3
s = 100
Therefore the sphere weighs 100 gram each.
