Determine if the equations x^2-y=1 defines y as a function of x

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Fast! find the length of cu. the triangles are similar. show your work.