A music teacher sells piano lesson packages. Piano Lesson Packages
Total Cost
Number of Lessons
$90
10
$160
20
$80
10
$120
20

Which package has the lowest ratio of cost to number of lessons?

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

When are triangles considered similar? a. corresponding angles are equal andcorresponding sides are proportionalb. corresponding angles are proportional andcorresponding sides are equalc. corresponding angles are equal orcorresponding sides are proportionald. corresponding angles are proportional orcorresponding sides are equal select the best answer from the choices providedmark this and retumsave and exitnext