Answer:
-11°C
Step-by-step explanation:
Original Temp = -2°C
Temp Drop (i.e temperature is reduced by) = 9°C
Final Temperature,
= Original Temp - Temp Drop
= -2°C - 9°C
= -11°C (Ans)
If you are trying to find the slope of a line that is perpendicular to another line, you would need to change the sign and change it to the fraction's reciprocal.
m = 
Change the sign of the slope:

Finally, make the reciprocal of the original slope (switching the numerator and denominator):

Simplify:
3
Final answer:

Answer:
1.671:1
Step-by-step explanation:
80/7=11.99(9) or ~12
90/12= 7.177(7)
11.99(9)/7.177(7)=1.671
1.671:1
this can be solve by 3 variable equation
let x be the money of luke
y money of rachel
z money of daniel
first equation
x = y + 21
second equation
x = z + 48
third equation
x + y + z = 168
solving simultaneously
x =79
y = 58
z = 31
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