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Oliga [24]
1 year ago
7

class A has 13 pupils and class b has 28 pupils both classes sit the same maths test the mean score for class A is 23 the mean s

core for class B is 57 what is the mean score (rounded to 2dp) in the maths test across both classes
Mathematics
1 answer:
Wittaler [7]1 year ago
7 0

Answer:

46.22

Step-by-step explanation:

Class A total= 23 x 13= 299

Clas B total= 57 x 28= 1596

total score= 299 + 1596 = 1895

total mean= 1895 ÷ (13+28) = 1895 ÷ 41

                 = 46.22

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Three fourths of a page are read in 2 minutes how many are read in one minute?
Dmitrij [34]

Answer:

3/8 of a page

Step-by-step explanation:

3/4=2 minutes

3/8 pages in a minute

You take 3/4 and divide by 2 to get 3/8

7 0
3 years ago
A vegetable store sold 3 tons of vegetables less on the first day than on the second, and on the third day it sold 5/9 of the am
Ilya [14]
Let
x---------> <span>quantity (ton) of vegetables sold the first day
</span>y---------> quantity (ton)  of vegetables sold the second day
z---------> quantity (ton) of vegetables sold the third day

we know that
x=y-3---------> equation 1
z=(5/9)*(x+y)------> equation 2
x+y+z=98-----> equation 3
substitute equation 2 in equation 3
x+y+[(5/9)*(x+y)]=98----> multiply by 9----> 9x+9y+5x+5y=882
14x+14y=882-----> equation 4

to resolve the equations system formed by
x=y-3
14x+14y=882

using a graph tool
see the attached figure
the solution is
x=30
y=33
x+y+z=98----> z=98-(x+y)----> z=98-63---> 35

the answer is
vegetables sold the first day----> 30 ton
vegetables sold the second day----> 33 ton
vegetables sold the third day------> 35 ton

8 0
3 years ago
Read 2 more answers
Please help me!!!<br><br> Would be appreciated! And will make you brainest
saw5 [17]

Answer:

A. $161

B. $161 * 12 = $1,932

Step-by-step explanation:

5 0
3 years ago
Anderson has $50 in his savings account. He deposits $5 every week. His father also deposits $20 into the account every time And
vodomira [7]
50 + 5w + 20m
The constant is 50.
A coefficient is 5 and another is 20.
A variable is w and another is m.
4 0
3 years ago
6(x-3)+10=(3x-4) NEED HELP ASAPP
fenix001 [56]

Answer:

=4/3 or 1 and 1/3

If it is not provided in the answer then put no solution.

Step-by-step explanation:

5 0
3 years ago
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