Answer:
A)
Step-by-step explanation:
(1/2)/2 = 1/4 because
(1/2)/2 = (1/2) * (1/2) = (1 * 1)/(2 * 2) = 1/4
In essence, to solve this equation, you must:
1) Flip the second fraction (or put the whole number under 1).
2) Change the divide sign into the multiply sign.
3) Multiply across.
A) 1/4 x 2 = 1/2 is your answer choice, for it is the opposite of the question.
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The answer is -
2x^2 + 2x + 7
The other person correct i just wanted to confirm i didnt want to copy but yes. so answer is what his answering is
(1) 2x-y+z=-7
(2) x-3y+4z=-19
(3) -x+4y-3z=18
Using the method of elimination:
Adding equation (2) and (3):
(x-3y+4z)+(-x+4y-3z)=(-19)+(18)
x-3y+4z-x+4y-3z=-19+18
y+z=-1
Solving for z:
y+z-y=-1-y
z=-1-y
Multiplying the third equation by 2:
(3) -x+4y-3z=18
2(-x+4y-3z=18)
-2x+8y-6z=36
Adding with equation (1)
(2x-y+z)+(-2x+8y-6z)=(-7)+(36)
2x-y+z-2x+8y-6z=-7+36
7y-5z=29
Replacing z=-1-y in the equation above:
7y-5(-1-y)=29
7y+5+5y=29
12y+5=29
Solving for y. Subtracting 5 both sides of the equation.
12y+5-5=29-5
12y=24
Dividing both side of the equation by 12:
12y/12=24/12
y=2
Replacing y=2 in z=-1-y
z=-1-2→z=-3
Replacing y=2 and z=-3 in the equation (2); and solving for x:
(2) x-3y+4z=-19
x-3(2)+4(-3)=-19
x-6-12=-19
x-18=-19
Adding 18 both sides of the equation:
x-18+18=-19+18
x=-1
There is one solution: (x,y,z)=(-1,2,-3)
Answer: Option <span>D. There is one solution (–1, 2, –3).</span>
Answer:
2x-2= -21
Step-by-step explanation:
