Answer:
The current temperature = 34.2°C
Step-by-step explanation:
Initial temperature = 46.8°C
After 20 minutes temperature reduced by 12.6°C
Therefore, the current temperature is = 46.8°C - 12.6°C = 34.2°C
The answer is 100 square inches
You set up the problem correctly, just keep going.
Expand out your expression:
2x(3x-9) + 4x(x+13)
= 6x^2 -18x + 4x^2 + 52x
= 10x^2 +34x
Remember that the above expression is the area, so it is equal to 24.
10x^2 + 34x = 24
10x^2 + 34x - 24 = 0 (divide by 2)
5x^2 + 17x - 12 = 0
Done.
20 + (34*10) = 360
320-360=40
(40/320)*100 = 12.5
12.5 / 10 = 1.25
1.25 * 12 = 15%
Hope this helps! :)
Answer:
-90
Step-by-step explanation:
$0.60+$0.10+$0.20= $0.90. which is the average