The temperature dropped 4°C every hour for 6 hours. What was the total number of degrees the temperature changed in the 6 hours?
2 answers:
Answer:
24 degrees.
Step-by-step explanation:
6 * 4 = 24.
Answer:
-24 degrees Celsius
Step-by-step explanation:
6 x -4 = -24
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If you want use elimination methode, then you add both sides of the equations:
![\underline{+\left\{\begin{array}{ccc}4x-3y=-10\\2x+3y=4\end{array}\right}\\.\qquad6x=-6\qquad\text{divide both sides by 6}\\.\qquad \boxed{x=-1}\\\\\text{Next, put the value of x to the first or second equation.}\\\\2x+3y=4\\.\qquad\Downarrow\\2(-1)+3y=4\\-2+3y=4\qquad\text{add 2 to both sides}\\3y=6\qquad\text{divide both sides by 3}\\\boxed{y=2}](https://tex.z-dn.net/?f=%5Cunderline%7B%2B%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bccc%7D4x-3y%3D-10%5C%5C2x%2B3y%3D4%5Cend%7Barray%7D%5Cright%7D%5C%5C.%5Cqquad6x%3D-6%5Cqquad%5Ctext%7Bdivide%20both%20sides%20by%206%7D%5C%5C.%5Cqquad%20%5Cboxed%7Bx%3D-1%7D%5C%5C%5C%5C%5Ctext%7BNext%2C%20put%20the%20value%20of%20x%20to%20the%20first%20or%20second%20equation.%7D%5C%5C%5C%5C2x%2B3y%3D4%5C%5C.%5Cqquad%5CDownarrow%5C%5C2%28-1%29%2B3y%3D4%5C%5C-2%2B3y%3D4%5Cqquad%5Ctext%7Badd%202%20to%20both%20sides%7D%5C%5C3y%3D6%5Cqquad%5Ctext%7Bdivide%20both%20sides%20by%203%7D%5C%5C%5Cboxed%7By%3D2%7D)
-18 = 6t
divide both sides by 6
t = -18 / 6
t = -3
(-15)+(-3)
(-15)-3
<u>-18</u>