a student scores 71 out of 100 on a test. if the maximum score on the next test is also 100, what score does the student need to maintain at least an average of 81?

Question

welshfella · Answer

x + 71 = 2*81 where x is the score needed

Find x

erniellyd28 · Answer

do i divide the answer from 2 times 81 on both sides?

welshfella · Answer

step 1  simplify 2*81
step 2 subtract 71 from both sides
This gives you the value of x

erniellyd28 · Answer

its confusing but im sure ill get it lol

pooja195 · Answer

Still need help? I can explain it to you if you'd like :) 
@erniellyd28

erniellyd28 · Answer

no i think i got that question but i do need help with this question please.parking in a student costs $3.00 for the first half hour and $1.75 for each hour thereafter. a partial hour is charged the same as a full hour. what is the longest time a student can park in this lot for $10.00