Jerry had an average score of 85 on his first 8 quizzes. He had an average score of 81 on his first nine quizzes. What score did he earn on his ninth quiz? side note: I got 49 the first time i tried it but when i checked it, it was wronfg
Answers
He did 8 quizzes, on average 85 points: 85*8=680 points.
He scored a number of points in his ninth quiz, let's call this number "x".
If we want to calculate the average after the ninth quiz, we take the sum of points then (which is 680+x) and we divide it by 9:
(680+x)/9
we also know that this is equal to 81:
(680+x)/9=81
multiply both sides by 9:
substracting 680 from both sides:
x=49
well, i got 49 too.
I really can't see where the mistake could be?
where did you check it? my best guess is that the place where you checked it had a typo...?
Related Questions
Rational algebraic expression is an expression that is the ratio of two
(02.02 HC)Andrew makes $6 an hour plus $9 an hour for every hour of overtime. Overtime hours are any hours more than 40 hours for the week. Part A: Create an equation that shows the amount of wages earned, W, for working x hours in a week when there is no overtime. (3 points) Part B: Create an equation that shows the amount of wages earned, S, for working y hours of overtime. Hint: Remember to include in the equation the amount earned from working 40 hours. (3 points) Part C: Andrew earned $330 in 1 week. How many hours (regular plus overtime) did he work? (4 points)
You and your friend are rolling number cubes. Each cube has 6 sides with the numbers 1 to 6. If a sum of 7 is rolled, your friend gets 1 point. If a 2, 3, or 4 is rolled, you get 1 point. After 108 rolls each, what scores should you expect? Friend: 54; You: 54 Friend: 18; You: 18 Friend: 54; You: 18 Friend: 18; You: 54
A table is 2 feet wide it is 6 times as long as it is wide
Answers
Answers
Answer: the third graph
Step-by-step explanation:
Ok so one way to do this is by plugging in points which is long but easiest. So since it’s the absolute value, whenever it passes the y- axis to the negative side, it will go up. So we know it’s either the third or last. The y intercept is -2, and the graph with that is the third.
Answer:
The third option.
Step-by-step explanation:
Answers
Answer:
4 Containers Can Be Filled By Each Two Pound Bag Of Candy .
Step-by-step explanation:
GIven Two Pound Bag Of Candy Used To Fill Container That hold Pound Each .
Now There are 4 Container of Capacity Pound Needed To fill Exactly 3 two Pound Bags .
Thus 4 container have Total capacity Of 6 Pound . Which Is Easily Filled By The 3 two Pound Bags . ( Without Any Loss )
Answers
Answer: 3.82
Step-by-step explanation: there is a decimal
16 children : 20 adults
yes
no
Answers
Answer:
No
Step-by-step explanation:
If product of mean = product of extreme, then ratios are equivalent.
18 : 12 :: 16:20
Product of mean = 12 * 16 = 192
Product of extreme = 18 * 20 = 360
Not equivalent ratios
120 mm
I’m begging atp. Please help me
Answers
area of blue shaded figure = area of big circle minus small circle
radius of big circle = 60mm
area of big circle= πr² = check pic