Answer:
x = 3
Step-by-step explanation:
To answer for x first distribute the 4 in the parenthesis
4x + 1 - 5x = 2x +4x - 20
Next add or subtract the x's
-x + 1 = 6x - 20
Now subtract 6x and 1 on both sides to get x on the left and the rest on the right
-7x = -21
Lastly, divide -7 on both sides
x = 3
Your answer is A!
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So basically the question wants to confuse by saying “6 months” which is half a year, right? Do everything normally until 4yrs and then write into compound interest formula but with n as 1/2 which is root.
Martha : 17% of 8 gallons
0.17(8) = 1.36 gallons
Brett : used 0.18
0.18(8) = 1.44
Mike : used 0.7
0.7(8) = 5.6 gallons
Mike used the most