Answer:
domain: (-∞, ∞) ; range: [-5, 0]
Step-by-step explanation:
Let's begin with the basics:
The domain of cos x is (-∞, ∞); the range is [-1, 1].
The domain of cos²x is still (-∞, ∞).
Likewise, the domain of -5 cos²x is(-∞, ∞).
The range of cos²x differs: it is [0, 1] because squaring a negative number results in a positive output.
Multiplying cos²x by 5 expands the range to [0, 5].
Finally, multiplying 5 cos²x by -1 changes the range to [-5, 0].
Answer:
81°+x=180°[co interior angles]
x=180°-81°
x=99°
x°=(3y+33)°
99°=(3y+33)°
99-33=3y
66=3y
66/3=y
22=y
0 to 0.5 she traveled 20 miles
0.5 to 1 she traveled about 40 miles
1 to 1.5 she traveled about 40 miles
1.5 to 2 she traveled about 30 miles
2 to 2.5 she traveled 0 miles
2.5 to 3 she traveled about 10 miles
3 to 3.5 she traveled about 20 miles
3.5 to 4 she traveled about 10 miles
So, I would say either 0.5 to 1 or 1 to 1.5 is when she drove the fastest.
The answer is a. $20.40
explaining: if you add 287 and 121, you’ll get 408. You can’t multiply percents so you have to change it into a decimal.
287+121=408
408x0.05= 20.40