A door-to-door salesman keeps a record of the number of homes he visits each day. Midpoint
4.5
Homes visited
0-9
10 - 19
20 - 29
30-39
40 - 49
Frequency
3
8
24
60
21
(a)
Estimate the mean number of homes visited. Give your answer to 3sf.

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step-by-step explanatio89

answer: 7. if the functions had a negative leading coefficient and is of even degree, which statement about the graph is true?

step-by-step explanation:

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function