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larisa [96]
2 years ago
5

. Abraham's physics class has 40 students, and his class had an average (arithmetic mean) score of 75 on the midterm. Anita’s ph

ysics class has 20 students, and her class had an average score of 81 on the same midterm. What was the average score of all the students in both physics classes on the midterm?
Mathematics
2 answers:
VMariaS [17]2 years ago
8 0
A=4620/60=77 i am pretty sure
sergiy2304 [10]2 years ago
5 0
Average=(scores total)/(number of scores)

We are given two averages and two numbers of students so we can calculate the total scores in each class..

75=Ab/40, so the sum of Abraham's class scores is 40(75)=3000 and similarly
81=An/20, so the sum of Anita's class scores is 20(81)=1620

Now we know the total score for all the students is 3000+1620=4620

And we also know that there are a total fo 40+20=60 students, so the overall average for all the students is

a=4620/60=77
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garik1379 [7]

Answer:

1.4000

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Step-by-step explanation:

1 4066 as an example start from the end a 5 or more it turns to a zero and the one next to it

so in this case we now have 4100 but since it isn't 5 or more we make it a zero and move on so now we have 4000

sorry if I am wrong I am also an idiot so hopefully this helps for the future :)

5 0
2 years ago
What number is equivalent to 80%, 0.8, 80/100
9966 [12]

Answer:

i think it is 80/100

Step-by-step explanation:

if it was 0.8 that would have been 8 so 80/100 is 80%

8 0
2 years ago
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Nastasia [14]

Answer:

It would be 7 + 2x = 15

8 0
2 years ago
How do I solve without s calculator?
baherus [9]
You could solve it ( without a graph) in 2 easy ways :

1 use the equation that you have written in pencil and solve for y

y=3=-x+4
y=-x +1

Or you could use the point slop form after you find the y intercept y=mx+b


-3=4(-1)+b
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So the answer would be y= -x +1


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5 0
3 years ago
We want the following inequality to be true: IMAGE BELOW!
marta [7]

Answer:

B. X=7

Step-by-step explanation:

Because 9 greater than 7

5 0
3 years ago
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