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1) which property of addition is used in the following ? (4 + 8) + 5 = 4 + (8 + 5)
a. commutative property
b. distributive property
c. identity property
d. associative property
2) which property of addition does 5 + 0 = 5 illustrate ?
a. distributive property
b. commutative property
c. zero property
identity property
3) which equation shows the commutative property of multiplication ?
a. 4x3-5x3 = (4 - 5) x 6
b. 9 x 2 = 2 x 9
c. 6 x 3 = 6 + 6 + 6
d. 7x1 = 7
4) simplify this expression : 4(y + z)
a. 4y + z
b. 4yz
(c. 4z + y
d. 4y + 4z
5) which is an example of associative property of addition ?
a. 4 + 7 = 7 + 4
b (7 + 3) + 6 = 7 + (3 + 6).
c. 2 + (-2) = 0
d. 9 + 0 = 9
6) which operation will not change the value of any nonzero number?
a) adding one
b. multiplying by zero
c. dividing by zero
d. multiplying by one

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.