Answer:
cos6x.
Step-by-step explanation:
We use the identity
cosAcosB - sinAsinB = cos(A+B)
so cos5xcosx - sin5xsinx = cos(5x + x)
= cos6x.
Answer:
Not probabillity of picking a green marble is 80%
Step-by-step explanation:
Answer: 
Step-by-step explanation:
By definition scientific notation has the following form:
Where a is a number between 1 and 10 but not including 10, and the exponent b is an integer.
The decimal point must be after the first digit.
Therefore, keeping the information above on mind, you can write the number as following:
Answer:
$30.60
Step-by-step explanation:
Please write that as 70%.
The total is the original price plus 70% of that price, or
100% plus 70%, or
170%
Change 170% to 1.70 and multiply the original price by that:
Total price including markup: 1.70($18) = $30.60
