Answer:
D.(2,-1,-1)
Step-by-step explanation:
-a+4b+2c=-8
3a+b-4c=9
b = -1
Substitute b=-1 into the other equations
-a -4 +2c = -8
3a -1 -4c =9
Multiply the first equation by 2 so we can eliminate c
-2a -8 +4c = -16
Add this to the second equation
-2a -8 +4c = -16
3a -1 -4c =9
-----------------
a -9 = -7
Add 9 to each side
a-9+9 = -7+9
a =2
b=-1
Now we need to find c
-a +4b +2c = -8
-2 -4 +2c = -8
-6+2c = -8
Add 6 to each side
-6+6 +2c = -8+6
2c = -2
Divide by 2
2c/2 = -2/2
c=-1
(2,-1,-1)
Answer: The value of y is 2
Step-by-step explanation:
If y=5-3 and 3x-y=-1
Take y=5-3 first
y = 5 - 3
y = 2
Then, take 3x-y=-1, and put y = 2 in the Expression
3x-y=-1
3x - (2) = -1
3x - 2 = -1
3x = -1 + (-2)
3x = -1 -2
3x = -3
To get x, divide both sides by 3
3x/3 = -3/3
x = -1
Thus, the value of y is 2 while x is -1
154 is the area so...
154 divided by 7 is 22
p= 2 (l+w)
p = 2 (22 + 7)
p = 2 (29)
p = 58 feet
the perimeter is 58 feet
Answer:
−9y
^2
−20x+29.32
Step-by-step explanation:
−9y
^2 −20x+(4.32+25)
−9y
^2
−20x+29.32
Answer:
12 inches of fabric
Step-by-step explanation:
Area of a triangle = hight x base
so 6 x 2 = 12
12 inches of fabric is your answer
Hope this helps :)
