Please help me! This is for a grade so if you don’t know it please don’t answer this question! I will give brainliest if right

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

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