Answer:
-34
Step-by-step explanation:
a + b = -6
x + y + z = -2
We want 8a so multiply the first equation by 8
8( a + b) = -6*8
8a+8b = -48
We also want -7x so multiply the second equation by -7
-7(x + y + z) = -2*-7
-7x-7y-7z = 14
Add the two equations together
8a+8b = -48
-7x-7y-7z = 14
-------------------------
8a+8b-7x-7y-7z = -34
Rearranging the order
8a - 7x - 7z - 7y + 8b = -34
5/10 is rhe reduced form because 5 goes into both so 25/5=5
And 50/5=10
Answer:
Step-by-step explanation:in standard form y= ax+b
-4y = -3x+28
4y =3x-28
or y= 3/4 x -7
So a= 3/4 = slope and -7 is y intercept ( parallel lines have same slope)
Equation 3 is
y= 3/4x-2
which also has slope = 3/4 and y intercept = -2
Parallel lines have same slope
Similarly a perpendicular line will have slope of - 1/a
For equation
y= ax+b
Perpendicular line is
y=( -1/a) x +c
Answer:
y-4x+12=0
Step-by-step explanation:
(x1,y1)=(2,-4) and m=4
y-y1=m(x-x1)
y-(-4)=4(x-2)
y+4=4x-8
y-4x+4+8=0
y-4x+12=0
(A) (B)
4------------------7
4------------------7
4------------------7
-------------------------
Total (A)=4+4+4=12
Total (B)=7+7+7=21
Total (A) + Total (B)=12+21=33
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(4+7)+(4+7)+(4+7)=11+11+11=33
