arty760 arty760

28-07-2018
Mathematics

contestada

A student has scores of 72%, and 78% on three mathematics examinations. What interval of scores does his last score need to fall in to earn a grade of B (80% or better)?

Respuesta :

altavistard altavistard

29-07-2018

The student wants a grade of x on his 3rd exam, so that the average of the 3 exam grades is 80:

72 + 78 + x

---------------- = 80

3

Solving for x: 72 + 78 + x = 240, or x = 90

If the student earns a grade of 90 or better on the 3rd exam, he will earn a course grade of 80 or better.

Answer Link

Otras preguntas

For which ailments has marijuana achieved medical benefits? a.Treating cancer b.Treating deafness c.Treating the flu To what has the medical marijuana debate

Jim and Abby each bought burgers and fries from the concession stand at the fair. Jim bought 3 burgers and 2 orders of fries for $17. Abby bought 2 burgers and

In response to the market revolution: a. the legal system worked with local governments to find better ways to regulate entrepreneurs. b. local judges protect

Is it normal to talk to people that aren’t there (not voices) and be unaware? It could be with someone you know or multiple strangers... asking for a friend.

The average distance between the earth and the sun is defined as being one

what are the purposes of checks and balances, and 3 branches of government

The esophagus is a tube that carries food from the mouth to the stomach. It does not secrete any enzymes or absorb any nutrients, but it does need to stand up t

What is the formula for median?

Which of the following is an example of an externality? a. Antonio’s dog barks loudly during the night, waking his neighbors. b. Gloria watches a scary movie. c

In anticipation of a major hurricane hitting the Gulf Coast, the quantity gasoline of sales rise from 360 million gallons to 375 million gallons. Based on

ACCESS MORE