Answer:
5.99/3
Step-by-step explanation:
Teachers usually except this stuff because it is technically correct
10 digits.
0, 1, 2, 3, 4, 5, 6, 7, 8, and 9
Answer:
≈ $138
Step-by-step explanation:
let h be heating bill and t be average outdoor temperature
Given h varies inversely with t then the equation relating them is
h = ← k is the constant of variation
To find k use the condition h = 190 and t = 40 , then
190 = ( multiply both sides by 40 )
7600 = k
h = ← equation of variation
When t = 55 , then
h = ≈ 138.1818
That is monthly heating bill is approximately $138 ( to nearest whole number )
Answer:
"I can find the maximum or minimum by looking at the factored expression of a quadratic function by reading off its roots and taking the arithmetic average of them to obtain the -coordinate of the quadratic function, and then substituting that value into the function."
Step-by-step explanation:
Because of the symmetry of quadratics (which is the case here because we have two factors of degree 1, so we are dealing with a <em>polynomial</em> of degree 2, which is a fancy way of saying that something is a quadratic), the -coordinate of the extremum (a fancy way of saying maximum or minimum) is the (arithmetic) average of the two roots.
In the factored form of a quadratic function, we can immediately read the roots: 3 and 7. Another way to see that is to solve , which gives (the 'V' stands for 'or'). We can take the average of the two roots to get the -coordinate of the minimum point of the graph (which, in this case, is ).
Having the -coordinate of the extremum, we can substitute this value into the function to obtain the maximum or minimum point of the graph, because that will give the -coordinate of the extremum.