Solve forx A-15° B-75° C-90° D-165°
2 answers:
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Answer:
17
Step-by-step explanation:
The expression of interest is the difference of the two given expressions.
(-4x +6y) -(-2x -7y) = (9) -(-8)
-2x +13y = 17
The value is 17.
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<em>Additional comment</em>
You could go to the trouble to solve the two equations for x and y, then compute the value of the expression you want. As we saw above, that is not necessary.
The first step in problem solving is always "look at the given information and how it relates to what you are asked." A little time spent doing that can save a lot of effort in the actual problem solving process.
Answer:
a.15.1 L/100 km; b $72.75; c. $51.34
Step-by-step explanation:
(a) Fuel consumption
Fuel used = 75 L
Distance travelled = 6096 km - 5600 km = 496 km
(b) Cost to fill tank
(c) Cost per week
i. Calculate the volume of gasoline
ii. Calculate its cost