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hannahmjohnson0443
03.08.2019 •
Mathematics
Judy pays $29 for 8 gallons of gas and 2 bottles of water. carmen pays $45 for 12 gallons of gas and 4 bottles of water. how much does one gallon of gas cost? how much does 1 bottle of water cost?
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Ответ:
w=bottle of water
8g + 2w = 29
12g + 4w = 45
I'm going to use elimination to cancel out the variable w by multiplying the first equation by -2.
-16g - 4w = -58
12g + 4w = 45
-4g = -13
/-4 /-4
g = 3.25
Now plug it into an equation, any equation.
8 (3.25) + 2w = 29
26 +2w=29
w=1.5
Now to check, plug it into both equations if you want.
12 (3.25) + 4 (1.5)=45
39 + 6=45
One bottle of water is $1.50, while one gallon of gas is $3.25.
Ответ:
0 -20 + 481 i took the test mark me the THE BRAINLIEST ANSWER!
Step-by-step explanation: