Question

The temperature was recorded for four straight days.The temperatures was recorded for the first three days were -2°,10°,and 7°.What must be the temperature recorded on the fourth day if the total temperature change was -4°?

Answer 1

Answer:

$-19^{\circ}$

Step-by-step explanation:

Let x represent temperature on 4th day.

We have been given that the temperatures was recorded for the first three days were -2°,10°,and 7°.

The total temperature on f days would be $-2^{\circ}+10^{\circ}+7^{\circ}+x$.

We have been given that total temperature change was -4°. We can represent this information in an equation as:

$-2^{\circ}+10^{\circ}+7^{\circ}+x=-4^{\circ}$

$15^{\circ}+x=-4^{\circ}$

$x=-4^{\circ}-15^{\circ}$

$x=-19^{\circ}$

Therefore, the temperature on 4th day must be equal to $-19^{\circ}$.