20. Joshua scored a 70, 80, 85, and 90 on his first four math quizzes. What 1 point score will Joshua need to earn on his fifth quiz to have an average of 80? *

75

Step-by-step explanation:

Let x represent the 5th score.  Then:

70 + 80 + 85 + 90 + x

= 80

                  5

Then:

150 + 175 + x                           325 + x

= 80           => = 80

           5                                          5

so that:  325 + x = 400

Thus, x = 75.

If Josh earns a 75 on his 5th quiz, his 5-quiz average will be 80.

75

Step-by-step explanation:

so we will do the equation

Multiply both sides by 5

325 + x = 400

Subtract both sides by 325

x =75

He needs to get a 75 on his fifth quiz to have an average of 80

Please brainliest

The correct answer is the greater the mass, the greater the force. The hockey puck will move a greater distance in crash 1 than in crash 2.

Explanation:

The force with which a body moves depends on the acceleration it has and its mass. Since the bodies are solid, inelastic shocks are produced, in which all the energy is transmitted from one body to another. In case 1, the impacting body has a greater mass, producing a greater force on the hockey puck, causing it to travel a greater distance. In the second case, being massless, there will be a crash where the body that impacts will be still and the hockey puck will move less than in case 1.

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