Jane has a average score of 73% on three quizzes. What must she score on the next quiz to have an average of 78%?

93

Step-by-step explanation:

The average is calculated as

average =

On 3 quizzes

= 73 ( multiply both sides by 3 )

sum = 219

On 4 quizzes, letting x be the score on fourth test

= 78 ( multiply both sides by 4 )

sum + x = 312 , that is

219 + x = 312 ( subtract 219 from both sides )

x = 93

She must score 93 on the next quiz

answer: .75 km

step-by-step explanation:

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.