To get to the dance competition finals, a dancer must average at least 8.5 points on their 4 preliminary dances. The scores for Jodi’s first 3 dances were: 8.9 points, 7.1 points, and 9.2 points. What is the lowest score that Jodi can get on the last dance and still make the finals?

Show all your work AND justify your steps.

She must score an 8.8 or higher

Step-by-step explanation:

The average is the sum of the number divided by the number of numbers

Let x be the score on the 4th dance

The average is

( 8.9+7.1+ 9.2+x)/4

This must be at least 8.5

( 8.9+7.1+ 9.2+x)/4≥ 8.5

Multiply by 4

( 8.9+7.1+ 9.2+x)/4*4≥ 8.5*4

( 8.9+7.1+ 9.2+x)≥ 34

Combine like terms

( 25.2+x)≥ 34

Subtract 25.2 from each side

( 25.2-25.2+x)≥ 34-25.2

x≥ 8.8

She must score an 8.8 or higher

no solution

step-by-step explanation:

there is not enough information in the problem to solve.

for me what is finding a good play list and going out because i can not lay down and relax so i usually go to a coffee shop. i also use the gum trick and this actually works. another advice is highlighting subjects it really does me remember certain things

step-by-step explanation: