Can anyone me / explain these to me? you.

The question to your answer is:

a) cos 150 = -√3 / 2 or - 0.866

b) tan 225 = 1

c) cos (-240) = -1/2

Step-by-step explanation:

See the picture below

She will save $ 60 in 6 weeks

Step-by-step explanation:

Given,

The amount she saved in first week = $24,

Also, the each week after the first she saves $6,

Suppose she saved x weeks after first week,

Then her total saving = 24 + 6x

If x = 5,

Therefore, her total saving in 6 weeks = 24 + 6(5) = 24 + 30 = $ 54