Answer:
Step-by-step explanation:
The explicit formula for an arithmetic sequence is
where n is the position of the number in the sequence, a1 is the first number in the sequence, and d is the common difference between the numbers.
If we are looking for the 91st term, our n = 91;
our a1 is 28, and
the common difference is -20. Putting all that together gives us the explicit formula for this sequence:
and
and
so
Answer:
13c+6-2
Explanation:
You combine the amount of cs with each other.
Answer:
x = 6.5
Step-by-step explanation:
Since all angles in a triangle adds up to 180°, we have:
10x - 10 + 10x + 8 + 8x = 180
28x - 2 = 180
28x = 182
x = 182/28 or 6.5
Answer:
The normal undiscounted price of the book is $17.25.
Step-by-step explanation:
This question can be solved using a rule of three.
After a 35% discount, a book costs $11.21
This means that $11.21 is 100-35 = 65% = 0.65 of the original price x.
How much is x, which is 100% = 1?
$11.21 - 0.65
$x - 1
The normal undiscounted price of the book is $17.25.
It won 5 and there were 7 races so 7-5 = 2 which means he lost 2 races so the win-lose ratio is 5:2 or 5/2
