1. Does the frequency distribution given appear to be normal? Years of service Frequency
1-5
5
6-10
20
11-15
25
16-20
18
21-25
5
26-30
1
No, there is not a concentration of frequencies in the middle.
Yes, there is not symmetry.
No, the frequencies increase, reach a maximum, then decrease.
O o
Yes, the frequencies are roughly symmetrical around the maximum.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

omg what happend to your question? if you could edit this question i can

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.