A scientist measures the change in the temperature of a chemical solution. At the start of the experiment, the solution is at a temperature of -12.94°C.
The temperature changes by -1.9°C each hour.
What is the temperature of the solution after 4 hours?

Since the temperature is -6 C after 3 hours when rounded to the nearest whole degree we have to do the following

Step-by-step explanation:

Temperatures= -14.96 and 2.9

Subtract to get the value=

Estimate the value to:

3+1=4

Thus, your answer is -7 C

a) x = -1 and y = -10

Step-by-step explanation:

The first part says find the value of y when the value of x is -3. Then the second part of the question is to find the value of x when the value of y is 2.

so lets solve part a)

So answer to part a is x = -1 and y = -10

similarly try the other parts.