No they are not correct. She should be adding 5 to the next terms instead of subtracting them. i.e. -27, -22, -17, -12, ...
In order to get -140, one number has to be negative and one number has to be positive. And these two numbers when added together give you a -4, which means the greater of these numbers has to be negative.
Try guess and check strategy by listing possible factor combinations for -140 and see which one works!
Answer:
<h2>
D) x=6</h2>
Step-by-step explanation:
<h3>
6x-5x = -1+7</h3><h3>
x = 6</h3>
<h2>
X = 6</h2>
Answer:
-20.1 degrees Celsius
Step-by-step explanation:
The system started at -12.6 Celsius. It then cooled 7.5 degrees during a reaction. Because it cooled, that means the difference is negative.
-12.6 degrees Celsius - 7.5 degrees Celsius = -20.1 degrees Celsius
It is important to always remember your correct names and variables for numbers in chemistry!
