Answer:
(3,6)
Step-by-step explanation:
2x-3y = -12
x+y=9. Solve for either y or x
-x. -x
y = -x + 9. Substitute this for the y
2x-3(-x+9)= -12
2x +3x-27 = -12. Add like terms
5x -27 = -12
+27. +27. Inverse operations
5x = 15
÷5. ÷5
x = 3
x + y = 9
3 + y = 9. Substitute 3 for x
-3. -3. Inverse operations
y = 6
Answer:
health inspector - every 7 days.
fire inspector - every 12 days
Step-by-step explanation:
a) health inspector fire inspector.
day 7. day 12.
day 14. day 24.
day 21. day 36.
day 28. day 48.
day 35. day 60.
b) 12 x 7 = 84.
it will be the same on day 84
Answer:
9y-24
Step-by-step explanation:
3(y-8)+3(2y)
3y-24+6y
9y-24
Answer:
0.1kg
Step-by-step explanation:
the scale that is measuring the weight can only measure to a precision of 0.1kg. if the measurement was 48.65, then the precision is 0.01kg.
