Answer:
the answer is 50
Step-by-step explanation:
you sub in 7 for h.(7+3) Which equals 10. Then you multiply 5 by 10 which equals 50!!
Answer: the old price for 1 liter is $0.3
Step-by-step explanation:
Let x represent the old price for 1 liter of petrol.
Last week a man bought 20 liters at the old price. This means that the total amount that the man paid for 20 liters is 20x.
The cost of petrol rises by 2 cents a liter. This means that the new price per liter is x + 2/100 = x + 0.02
This week he bought 10 liters at the new price. This means that the total amount that the man paid for 10 liters is
10(x + 0.02)
= 10x + 0.2
Altogether, the petrol costs $9.20. This means that
20x + 10x + 0.2 = 9.2
30x + 0.2 = 9.2
30x = 9.2 - 0.2
30x = 9
x = 9/30
x = 0.3
With long division the answer is 2411
Just equate both to each other and you get:
<span>x + 1 = y = 4x + 5
Leave out the y, and you get
</span>x + 1 = 4x + 5
That was I believe your first option.
You can now work out x:
-3x = 4 => x = -4/3
Recall that 1 rotation is the equivalent of 360 degrees or 2pi radians.
7.5 rotations clockwise 2pi rad
------------------------------- * ---------------------------------------
1 1 rotation counterclockwise
= -47.12 radians, or -2700 degrees.