Given:
The inequality is
.
To find:
The graph of the given inequality.
Solution:
The inequality is

The related equation is

For x=0,



For y=0,




So, the related line passes through two points (0,-4) and (-2,0).
Sign of inequality is <, so the related line is a dotted line and shaded region is below the related line.
Therefore, the correct option is B.
Answer:
The approximate temperature of the preheated oven is 204 °C.
Step-by-step explanation:
Here, the given temperature in Fahrenheit = 400 °F
Let us assume the given temperature in Celsius = C
Now, the relation between the two measure of temperature is given as:

According to the question:
Or, C = 204.4°C
Hence, the approximate temperature of the preheated oven is 204 °C.
Answer:
Step-by-step explanation:
I dont quite understand the problem but this is one way to solve it using completing the square:-
2x^2 + 8x - 12 = 0
2(x^2 + 4x) - 12 = 0
2((x + 2)^2 - 4) = 12
2(x + 2)^2 - 8 + 8 = 12 + 8
2(x + 2)^2 = 20