Question

Algebra 2 word problem?

Answer 1

Going into a final exam which counts as two grades, Kendra has test scores of 84,78,64, and 88. What score does Kendra need on the final exam in order to have an average of 80?

Answer 2

hmm lets do this

let x=score she needs to get 80 right?

Answer 3

yes

Answer 4

so would you add all the scores together and divide it by 4?

Answer 5

\[\frac{ 2x+84+78+64+88 }{ 6 } =80 \] right?

Answer 6

yes, because the final counts as two test scores

Answer 7

i think thats what i got wrong before

Answer 8

\[\frac{ 2x+314 }{ 6} = ? \]

Answer 9

if you add it up you get 314 :P

Answer 10

oh i see

Answer 11

and then you would just multiply the 6 out and get 314 +2x=480, right?

Answer 12

yes

Answer 13

now

\[2x = 480 - 314\]

Answer 14

so x=83?

Answer 15

yes!!

Answer 16

thank you so much!!

Answer 17

you're welcome :-)