Answer:
Problem:
Solve x+y=7;x+2y=11
Steps:
I will try to solve your system of equations.
x+y=7;x+2y=11
Step: Solvex+y=7for x:
x+y+−y=7+−y(Add -y to both sides)
x=−y+7
Step: Substitute−y+7forxinx+2y=11:
x+2y=11
−y+7+2y=11
y+7=11(Simplify both sides of the equation)
y+7+−7=11+−7(Add -7 to both sides)
y=4
Step: Substitute4foryinx=−y+7:
x=−y+7
x=−4+7
x=3(Simplify both sides of the equation)
Answer:
x=3 and y=4
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
Hey!~
I believe the correct answer is C, a postulate .
Hope this helps and have a great day!
-Lindsey
Answer:
(0,-10)
Step-by-step explanation:
Using the equation y = mx = b where b is the y-intercept,
we can find that the "b" in y=|3x-10|+1 is -10
So the y-intercept is -10 or at the coordinates (0,-10)
Answer:
y - 31 = 7/3(x - 12)
Step-by-step explanation:
Point slope form is: y - y1 = m(x - x1), where m is the slope and (x1, y1) is a point
Plug in the slope and the given point:
y - y1 = m(x - x1)
y - 31 = 7/3(x - 12)
So, the point-slope form of the line is y - 31 = 7/3(x - 12)