Mathematics
30.06.2022 15:42
117
263
7
leomcintyre12
4,7(11 marks)
8
This is because you have to half it and half it again.
So half of 32=16 half of 16=8
This is because you have to half it and half it again.
So half of 32=16 half of 16=8
Brook211
4,5(27 marks)
This is simple. 32 divided by 4 is 8. A quarter of 32 is 8.
dondre54
4,5(27 marks)
x – 3y = 9 (1)
1/5x - 2y = -1 (2)
(1):
x - 3y = 9
x = 9 + 3y (1a)
(2):
1/5x - 2y = -1
x - 10y = -5 (2a)
Sub (1a) into (2a):
9 + 3y - 10y = -5
9 - 7y = -5
-7y = -5 - 9
-7y = -14
7y = 14
y = 2 Sub into (1a)
x = 9 + 3y
x = 9 + 3(2)
x = 9 + 6
x = 15
Ans: x = 15, y = 2
1/5x - 2y = -1 (2)
(1):
x - 3y = 9
x = 9 + 3y (1a)
(2):
1/5x - 2y = -1
x - 10y = -5 (2a)
Sub (1a) into (2a):
9 + 3y - 10y = -5
9 - 7y = -5
-7y = -5 - 9
-7y = -14
7y = 14
y = 2 Sub into (1a)
x = 9 + 3y
x = 9 + 3(2)
x = 9 + 6
x = 15
Ans: x = 15, y = 2
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