Select all equations that have infinitely many solutions. 14x + 6 = 2(5x + 3)
3(x - 5) + 6 = x - (9 - 2x)
2 + 5x - 9 = 3x + 2(x - 7)
3(4x - 6) + 2 = -4(4 - 3x)

Yoku is putting on sunscreen. he uses 2\text{ ml}2 ml to cover 50\text{ cm}^250 cm 2 of his skin. he wants to know how many milliliters of sunscreen (c)(c) he needs to cover 325\text{ cm}^2325 cm 2 of his skin. how many milliliters of sunscreen does yoku need to cover 325 \text{ cm}^2325 cm 2 of his skin?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.