Answer:
<h2>21</h2>
Step-by-step explanation:
The value that is closest
to 85% of 25 is 21 because
85% of is 21.25 and rounding
21.25 to the whole number is 21.
<em>Hope this helps! <3</em>
Answer:
(5k+14)(3k+8)
Step-by-step explanation:
Answer:
no it's 4540
Step-by-step explanation:
you just subtract 5220 from 9760 and you get your difference
Answer:
second one: -4x +6
third one: 4x - 16
fourth: 245x + 30
fifth: 81x - 21x
(last one) sixth: 1600x + 8x
( if this goes wrong then I did something else)
All the numbers in this range can be written as

with

and

. Construct a table like so (see attached; apparently the environment for constructing tables isn't supported on this site...)
so that each entry in the table corresponds to the sum of the tens digit (row) and the ones digit (column). Now, you want to find the numbers whose digits add to perfect squares, which occurs when the sum of the digits is either of 1, 4, 9, or 16. You'll notice that this happens along some diagonals.
For each number that occupies an entire diagonal in the table, it's easy to see that that number

shows up

times in the table, so there is one instance of 1, four of 4, and nine of 9. Meanwhile, 16 shows up only twice due to the constraints of the table.
So there are 16 instances of two digit numbers between 10 and 92 whose digits add to perfect squares.