Answer:
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Step-by-step explanation:
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First, using elimination method for eq. 1 and 2 to eliminate one of the variables.
2x - y + 3z = 8
-2x + 3y - 2z = 10
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2y + z = 18
z = 18 - 2y
Now eq. 1 and 3, but multiple eq.1 with 2.
2x + 4y - 2z = 8
-2x + 3y - 2z = 10
----------------------------
7y - 4z = 18
Now you have two new equations 7y -4z = 18 and z = 18 - 2y. Solve for y and z, using substitute method.
7y - 4z = 18
7y - 4(18 - 2y) = 18
7y - 72 + 8y = 18
15y = 18+72
y = 90/15
y = 6
Find z using one of the two new equations.
z = 18 - 2y
z = 18 - 2(6)
z = 18 - 12
z = 6
Now you got y and z, find x using any one of the main three equations.
x + 2y - z = 4
X + 2(6) - 6 = 4
x + 12 - 6 = 4
x = 4 - 6
x = -2
Solutions:
x = -2
y = 6
z = 6
Answer:
y= 4(x+4)(x-1)
Step-by-step explanation:
Since the leading coefficient is 4, put that in front of the parentheses.
The root -4 must be added to x to be graphed correctly. The root 1 must be subtracted from x to be graphed correctly.
y= 4(x+4)(x-1)
2.1 x 10 to the power of 4.
10x10= 100 x 10= 1,000 x 10= 10,000
10,000 x 2.1= 21,000
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Answer: 5, 5
Step-by-step explanation: On the first spinner, the number 5 is located in the top-right corner.
On the second spinner, the two number 5s are i the top-right and right areas.