addzeyofficial addzeyofficial

25-04-2022
Mathematics

contestada

Mac has taken seven maths exams this year. His average mark is 78%. What mark must he get on the eighth exam to raise his average to 80%?

Respuesta :

joemamamamamamamm joemamamamamamamm

25-04-2022

Answer:

94

Step-by-step explanation:

7*78 + x = 8*80

x = 94

Or, think that he was short 2 points on each of 7 tests, so he has to make them all (14) up on the last test.

Answer Link

Otras preguntas

Which of these is one reason that American workers generally favored immigration restriction? Immigrants tended to be anti-union. Immigrants were often willing

one impact the importation of cotton had on great britain

Find the height, in feet, of the rock after 5 seconds in the air. A rock is launched from a cannon. It’s height, h(x), can be represented by a quadratic functio

As a result of the Great Railroad Strike of 1877, railroad companies lost millions of dollars because?

10 to the power of 5 times 10 to the power of 8?

solve for x 8x-15=17

Fighting in Vietnam started in 1954 when which European nation tried to reassert their colonial claims to Indochina? France Great Britain The Netherlands German

6^2/2(3)+4= what is the answer

In the late 1800s many industrialists set up welfare institutions and organizations to help the urban poor. Please select the best answer from the choices provi

What is outpatient drug-free treatment?