The diameter and the height of this cylinder are equal to the same length s of the cube

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

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?