The students in Mr. Cramers class take a science test. This histogram shows the results of their test. How many students scoured at least 80 points

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1