Answer:
x = -2, y=1
Step-by-step explanation:
x-7y=-9---------------------equation 1
-x+8y=10-------------------equation 2
From equation 1, make x the subject of formula
x=7y-9----------------------equation 3
substituting x=7y-9 in equation 2,
-(7y-9)+8y=10
Expanding bracket
-7y+9+8y=10
Collecting like terms
8y-7y=10-9
y=1
substituting y=1 in 3
x=7(1)-9
x=7-9
x=-2
Given:
7 kg turkey
cooking instructions:
over 4kg allow 20 minutes per kg, plus 90 minutes
always leave the turkey to rest for 30 minutes before carving.
7kg * 20 minutes/kg = 140 minutes
140 minutes + 90 minutes = 230 minutes
230 minutes + 30 minutes rest = 260 minutes
260 minutes * 1hr/60 minutes = 4 hours 20 minutes
17:15 is 5:15 pm
17:15 - 4:20 = 12:55 pm
Adam should start cooking at 12:55 pm
Answer:
3.2x10-3=2.18 or x=2.18 So one thats greater is 8.0x+6-2=4.0 or x=4
Step-by-step explanation:
I wasnt sure about what they were asking but here.
3.2x=10-3 8.0x+6-2
+3 +3 +2 +2
3.2x+3=10 8.0x+2=6
-3 -3 -2 -2
3.2x=7 8.0x=4
7/3.2 = 2.18 ÷4 ÷4
x=4
I think I did this a bit wrong...but I hope this helps a little bit!
Answer:
495
Step-by-step explanation:
12C4 = 12*11*10*9/(4*3*2*1) = 495
