16. Joe has 5 sports cards. He bought 3 packs with
the same number of cards in each pack. If he
now has 35 cards in all, how many were in each
pack? Write an equation, and show how to solve
it algebraically. Verify your answer by substituting
it in your equation or by using algebra tiles.

We can write an equation like; 5 + 3x = 35

Steps to solve:

5 - 5 + 3x = 35 - 5

3x = 30

3x/3 = 30/3

x = 10

There were 10 cards per pack.

Best of Luck!

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

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.