Answer:
37.6991118431
Step-by-step explanation:
can i have brainliest?
Answer:
(10x - 9y)(10x + 9y)
Step-by-step explanation:
100x² - 81y² ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
100x² - 81y²
= (10x)² - (9y)²
= (10x - 9y)(10x + 9y)
Answer:
4 tables of cinnamon 2 tables of nut 2 tables of allspice and 1 table of cloves.
Step-by-step explanation:
Try this solution:
let the unknown two-digits number be 'xy'.
Then it is possible to write any two-digit number as 10x+y, where x - the tens digit and y - the unit digit.
Using the rule described above the phrase 'the tens digit of a number is twice the units digit' may be written as x=2y.
Using the same rule the phrase 'if the digits are reversed, the new number is 36 is less than the original number' may be written as (10x+y)-(10y+x)=36.
These two equations may be resolved as system of two equations:
![\left \{ {{x=2y} \atop {10x+y-(10y+x)=36}} \right. \ =\ \textgreater \ \ \left \{ {{x=8} \atop {y=4}} \right.](https://tex.z-dn.net/?f=%20%5Cleft%20%5C%7B%20%7B%7Bx%3D2y%7D%20%5Catop%20%7B10x%2By-%2810y%2Bx%29%3D36%7D%7D%20%5Cright.%20%5C%20%3D%5C%20%5Ctextgreater%20%5C%20%20%5C%20%20%5Cleft%20%5C%7B%20%7B%7Bx%3D8%7D%20%5Catop%20%7By%3D4%7D%7D%20%5Cright.%20)
Check: the original number is 84, the new number is 48; difference is 84-48=36.
answer: 84