Answer:
It is equal to 0.
Step-by-step explanation:
I can simplify it as follows:
sinα sin(90 - α) - cos(90 - α)(cosα)
Now sin(90 -α) = cosα and cos(90 - α) = sinα) ( for α < 90)
So the expression becomes:
sinαcosα - sinαcosα
= 0 .
Answer:
10%
Step-by-step explanation:
20%=20/100=0.20
75$x.0.20=15$
The price when she received a 20% discount was:
75$-15$=60$
Then, the web site applied a 10% service fee to the discounted price, so you have:
10/100=0.10
75$x0.10=7.5$
60$+7.5$=67.5$
So, if 75$ is the 100% of the price, what percentage represents 67.5$?
75$--------100%
67.5$------x
x=67.5 x 100/75
x=90%
Then,
100%-90%=10%
x
Just rewrite <span>y = ---- as y = (1/3)x. The unit rate is 1/3.
3</span>
The two trains the same distance from Buffalo is 20
