Answer:“ C ”
“month” on the x axis and “log” on the y axis
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
Yes, because you can multiply $3 by 3 to get $9 and 6 muffins by 3 to get 9 muffins.
The question is asking what will we get if we add 1+1.
Let us use an example to understand this.
Example:
Suppose Amy has 1 ice cream and her brother Ruth has also got one ice cream.
Now if they both finished their ice creams, how many total ice creams were finished.
So we see that 1 and 1 add up to give two ice creams and so two ice creams are finished by them both.
Applying this to our question adding 1 and 1 gives us 2.
Answer : 1+1 =2
<u>Answer and explanation</u>
(1+sinθ)(1-sinθ)=cos²θ
We are to prove that the left hand side is equal to the right hand side.
(1+sinθ)(1-sinθ) = 1(1-sinθ) + sinθ(1-sinθ)
= 1 - sinθ + sinθ - sin²θ
= 1 - sin²θ
From the trigonometric identity sin²θ + cos²θ = 1,
1 - sin²θ = cos²θ
