Answer:
The mean score in the math test for class B=28.47
Step-by-step explanation:
<em>Step 1: Determine the total number of students in both Classes</em>
Total number of students=number in class A+number in class B
where;
number in class A=11 pupils
number in class B=15 pupils
replacing;
Total number of students=11+15=26 students
<em>Step 2: Determine total score for both classes</em>
Total score for both classes=total score for class A+total score for class B
total score for both classes=mean score for both classes×total number of students
total score for both classes=(49×26)=1,274
total score for class A=mean score for class A×total number of class A students
total score for class A=(77×11)=847
total score for class B=mean score for class B×total number of class B students
total score for class B=m×15=15 m
replacing;
1,274=847+15 m
15 m=1,274-847
15 m=427
m=427/15=28.47
The mean score in the math test for class B=28.47
Answer:
Inverse Property of Addition
Step-by-step explanation:
Any problems that will go into the inverse property of addition must equal 0. In this case, the equation above shows two of the same numbers with opposite signs in which that will equal to zero.
Answer:
n=16
Step-by-step explanation:
Make an equation
Three times a number minus 9–> 3n-9
Times means multiply, and minus means subtract
Equals two times the number plus 7–> =2n+7
Times means multiply, and plus means add
3n-9=2n+7
Solve for n, by getting n by itself
Subtract 2n from both sides
3n-2n-9=2n-2n+7
n-9=7
Add 9 to both sides
n-9+9=7+9
n=16
Answer:
Step-by-step explanation:
Hi there,
I'm not exactly sure what you are trying to ask here. Do you need help with arithmetic?
Feel free to reach out for help.
Cheers.
Answer:
7)m=-4
8)p=1
9)v=-12
10)n=-7
11)-13=x
12)b=-4
13)-108=b
14)n=4
Step-by-step explanation: