Oh how I miss the days when math was as simple as 2+2=4.
Educated guess here: By putting parentheses.
Answer:
sin -115° = -0.91
Step-by-step explanation:
Point A is (cos 115°, sin 115°). Since cos 115° = -0.42 and sin 115° ≈ 0.91, it means that the coordinates at point A is (-0.42, 0.91).
As for point B which was revolved around -115°,
the coordinates will be similar to point A but you just have to change the negative.
B(cos -115°, sin -115°) = B(0.42, -0.91)
Answer:
15 quarters, 10 nickels
Step-by-step explanation:


multiply the first equation by -0.25 and add the second equation to it

________________
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has 10 nickels
has 15 quarters
10(.05) +15(0.25) = 0.5 + 3.75 = 4.25
Hope this helps
You would take 3 into 7.5 to get that scale factor.