What are theses shapes
1 answer:
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Answer:
23.64 gallons
Step-by-step explanation:
Given:
Samantha drove her car with a full tank of gas 268 miles to her friends town
for an average of 22.68 miles/gallons and then refilled her car with gas.
Question asked:
How much gas was used by the car on the trip ?
Solution:
<u><em>By unitary method:</em></u>
<u>As average of car is given 22.68 miles/gallons:</u>
For 22.68 miles, number of gallons of gas used = 1
For 1 mile, number of gallons of gas used =
For 268 mile, number of gallons of gas used =
=
Now, to find total gas used in whole trip :-
11.82 + 11.82 = 23.64 gallons of gas
Thus, 23.64 gallons of gas used by the car on the trip.
Hi there! Marcie made a mistake in the last step of the solving process.
Let's solve this problem step by step!
−2(x − 5) − 12 ≤ 4 + 6(x + 3)
First work out the parenthesis, which can for instance be done using rainbow method.
−2x + 10 − 12 ≤ 4 + 6x + 18
The parenthesis are worked out correctly. Remember that multiplying a negative by a negative gives you a positive.
Now we can collect the terms.
−2x − 2 ≤ 6x + 22
The terms are collected correctly.
Next up is subtracting 6x from both sides and adding 2 to both sides of the inequality.
−8x ≤ 24
This step is also correct.
Finally we must divide both sides of the inequality by -8 to find our answer. Be aware of the fact that the sign flips when dividing by a negative!
x ≤ −3
Mistake! Marcie forgot to flip the sign. Instead the answer should be
~ Hope this helps you!
Let's solve this problem step by step!
−2(x − 5) − 12 ≤ 4 + 6(x + 3)
First work out the parenthesis, which can for instance be done using rainbow method.
−2x + 10 − 12 ≤ 4 + 6x + 18
The parenthesis are worked out correctly. Remember that multiplying a negative by a negative gives you a positive.
Now we can collect the terms.
−2x − 2 ≤ 6x + 22
The terms are collected correctly.
Next up is subtracting 6x from both sides and adding 2 to both sides of the inequality.
−8x ≤ 24
This step is also correct.
Finally we must divide both sides of the inequality by -8 to find our answer. Be aware of the fact that the sign flips when dividing by a negative!
x ≤ −3
Mistake! Marcie forgot to flip the sign. Instead the answer should be
~ Hope this helps you!