Write a mathematical expression for the word expression. Seven times a number plus one

What are the soultion(s) to the quadratic equation 40- x^2=0

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?

Consider the graph of the exponential function y=3(2)×