Kyle’s first four quizzes had a mean score of 80%. If he scores 100% on his next quiz, what will be his mean quiz score for the first five quizzes?

let's consider 80%= 80 marks

mean of four quizzes is 80.

sum of four quizzes :

=> 80*4 = 320

sum of Five quizzes:

=> 320 + 100 = 420

Therefore, mean of 5 quizzes:

=>  420/5 = 84

so the answer is 84%

4444444444444 i think

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!