brianna59369 brianna59369
  • 02-09-2021
  • Mathematics
contestada

uma wanted to have a test average of 85%. On her first 7 tests she averaged 83% on her tests. what does she need to get on her 8th test to have an overall average of 85%

Respuesta :

lyuck lyuck
  • 02-09-2021

Answer:

99%

Step-by-step explanation:

83% * 7 tests = 581

[tex]\frac{581+x}{8} =85[/tex]

solve for x (the percentage needed on the 8th test)

x = 99%

Answer Link

Otras preguntas

write a polynomial function if its leading coefficient is -3, and its roots include 4, 0 and 5x-2i.
PLEASE HELP WILL GIVE BRAINLIEST AND 5.0 RATING
HE HE HEEEEEEEEEEEEEEEEEEEEEEE
when was the 2 president born
If the x-intercept is 7, the point version would be written as (answer)
Karl does laundry every 12 days and sweeps the floor every 14 days. If Karl does both chores today, how many days from now will he do both chores again?
Calculate the mass of 5.0x 1014 molecules of water
what is the size of amoeba​
Rewrite the following sentences using the correct form of 5. (a) Shakespeare .... (write ) many famous plays. (b) When Jack arrived home, Carol already ...... (
Which of the following correctly sets up the point-slope equation for this line? y−7=13(x+6)y-7=\frac{1}{3}\left ( x+6 \right )y−7= 3 1 ​ (x+6) y+7=13(x+6)y+7