Step-by-step explanation:
<u>Substitute x = -118 and y = -114 into the expressions:</u>
<u>1</u><u>:</u>
Correct.
<u>Use integer rule for #2:</u>
Incorrect.
*This answer can be a positive when terms are switched.
<u>3:</u>
When two negatives multiply, the product remains positive.
Incorrect.
<u>4:</u>
<u></u>
When two negatives divide, the quotient remains positive.
Incorrect.
Answer:
a.
b. $37.50
Step-by-step explanation:
To find out how much the 5 were paying in total, we can add the bill and the tip. This gives us x + 10. Since there are 5 people and they are splitting the bill equally, the total amount would be divided by 5 to get the amount each person pays: . We already know the amount they each paid, as it is given as $9.50. Both expressions represent the same thing, do we can set them equal to each other:
Now, we can solve.
First, we can multiply by 5 on both sides to get:
47.5 = x + 10
And then subtract 10:
x = 37.5
This means the bill before the tip was $37.50