Answer:
−c=d−r−a
Step-by-step explanation:
if we move a value to the other side of the equal sign, the value switches positive and negative signs, in this case A moved to the right, which caused it to turn negative.
Answer:
x=-2, y=-6
Step-by-step explanation:
Simple substitution.
Since y is isolated in one of the equations already, you can plug it into the second equation.
x - 2(3x) = 10
x - 6x = 10
-5x = 10
x = -2
Sub. x = -2 into 3x = y:
3(-2) = y
y = -6
Answer:
x = -1 and y = 18
Step-by-step explanation:
Given the system of equations
y + 8x = 10... 1
2y - 4x = 40 ... 2
From 1; y = 10-8x
Substitute into 2;
2(10-8x) - 4x = 40
20 - 16x - 4x = 40
20 - 20x = 40
-20x = 40 - 20
-20x = 20
x = -1
Recall that y = 10-8x
y = 10 - 8(-1)
y = 10 + 8
y = 18
therefore your answer is x = -1 and y = 18
Answer:
mean=13.2
median=13
mode=14
Step-by-step explanation:
mean=sum of values/number of values
sum of values=9+17+14+12+14+14+9+11+10+20+10+22+11+11+9+15+14+15=237
number of values=18
mean=237/18=13.17
Mean=13.2
Arranging data in ascending order
9 9 9 10 10 11 11 11 12 14 14 14 14 15 15 17 20 22
n/2=18/2=9 is an integer so,
median= the average of (n/2)th and (n/2 +1)th observation
median=(12+14)/2=26/2=13
Median=13
Mode= The most repeated observation in the data
14 is repeated more than other numbers so, 14 is the mode for this data.
Mode=14
