The scores danna earned on her last five math tests are shown 87, 81, 90, 33, 84 which measure of central tendency is best to describe how danna generally performed on her tests? .a mean b median c mode d range

1 and 2

step-by-step explanation:

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons