For this case, the first thing we should use is the following equation:
c (w) = 0.013w ^ 2-w-7
We note that w = 20 belongs to the interval [5, 30]. Therefore, we can use the equation.
Substituting w = 20 we have:
c (20) = 0.013 * (20) ^ 2- (20) -7
c (20) = - 21.8
Answer:
the wind chill temperature at 0f if the wind speed is 20 miles per hour is:
c (20) = - 21.8
She’ll have 4 groups of 6 students and one group of five.
6x4= 24 students.
29-24= 5 students left over
Tnemos el sisema de ecuaciones:

Podemos resolverlo por eliminación sumando ambas ecuaciones y eliminando y. Asi podemos resolver para x:

Ahora podemos resolver para y con cualquiera de las dos ecuaciones:

Respuesta: x=-3, y=0
Letter A 4 Liters jdnsiws
The correct answer is shown in attached figure
To find the correct graph, we should study the continuity of the function
Check the continuity at x = -2
from the left ⇒⇒ f(-2) = 1/2 * -2 + 3 = 2
from the right ⇒⇒ f(-2) = 2
∴ The function is continuous at x = -2
Check the continuity at x = 3
from the left ⇒⇒ f(3) = 2
from the right ⇒⇒ f(3) = 2*3 - 3 = 3
∴ The function is jump discontinuous at x = 3
From the previous results the correct graph is the last as shown in attached graph.