Using the function g(x) = 0.4x - 1.8, what would the input need to be for an output of 4.6?

g(x) = 0.4x - 1.8

Since the output, or g(x), is 4.6, substitute that number in for g(x).

4.6 = 0.4x - 1.8

Add 1.8 to both sides of the equation.

4.6 + 1.8 = 0.4x - 1.8 + 1.8

6.4 = 0.4x

Now, divide 6.4 by 0.4.

The answer is x = 16. The output is also x.

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.

answer: d. $20

step-by-step explanation:

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