Pam and her brother both open savings accounts. Each starts with a zero dollar balance. For every two dollars Pam saves in her account, her brother saves five dollars in her account. Determine a ratio to describe the money in Pam's account to the money in her brother's account.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

it shoild be o

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!