Answer:
The arc length of the semicircle is half the circumference of the full circle
The graph that represents the system of inequalities is graph 3
Answer:
(-10, 0) and (0,-5)
Step-by-step explanation:
For the function 
find x-intercept and y-intercept:
1. when y=0, then
2. when x=0, then
You get two points (-10, 0) and (0,-5). Plot them on the coordinate plane and connect, obtained line is the graph of the linear function 
Answer:
Dulce and Luis buy some fruit at the market. Dulce buys 5 cartons of blueberries for a total cost of $13.75. At this
Step-by-step explanation:
A cosine is just a sine shifted to the left by π/2. A cosine of 4x is shifted to the left by only π/8 because of the factor 4. Sketch them.
The region we're looking for is this sausage-shaped part between the cos and the sin.
The x intercepts are at π/8 for the cosine and π/4 for the sine. The midpoint between them is at (π/8 + π/4)/2 = 3/16π.
The region is point symmetric around the x axis, so the y coordinate of the centroid is 0.
So the centroid is at (3/16π, 0)
