2x - 2y + z = 5....multiply by -1
2x - 2y + 3z = 7
-------------------
-2x + 2y - z = -5 (result of multiplying by -1)
2x - 2y + 3z = 7
-------------------add
2z = 2
z = 2/2 = 1
2x - 2y + z = 5.....multiply by 3
-3x - 3y + 3z = 9...multiply by 2
-------------------
6x - 6y + 3z = 15 (result of multiplying by 3)
-6x - 6y + 6z = 18 (result of multiplying by 2)
-------------------add
-12y + 9z = 33
-12y + 9(1) = 33
-12y + 9 = 33
-12y = 33 - 9
-12y = 24
y = -24/12
y = -2
2x - 2y + z = 5
2x - 2(-2) + 1 = 5
2x + 4 + 1 = 5
2x + 5 = 5
2x = 5 - 5
2x = 0
x = 0
solution is : (0,-2,1)
17% of 700 cm is 1.19 meters.
Answer:
NOPE
Step-by-step explanation:
Answer:
Mean
Step-by-step explanation:
Mean is the average of all results.
Step 1 : Identify the formula of calculating mean
Mean = <u>Sum of all data</u>
Number of data
Step 2 : Substitute the values in the formula
Mean = <u>10 + 15 + 25 +75 + 75 + 77 + 80 +83 + 85 + 90</u>
10
Mean = <u>615</u>
10
Mean = 61.5 marks
!!
Look at your hundred place is 5 you round it up for the 2 to turn into a 3 so your answer would be 363,000.