The digits of a two-digit number sum to 8. when the digits are reversed, the resulting number is 18 less than the original
number. what is the original number?

It's 53.

Step-by-step explanation:

Let the number be xy so the digits are x and y, so:

x + y = 8(1)

Reversing the 2 digits we have the number 10y + x and this equals

10x + y - 18 so we have the equation:-

10x + y - 18 = 10y + x

9x - 9y = 18

x - y = 2(2)   Adding equations (1) and (2) we have:

2x = 10

x = 5

and y = 8 - 5 = 3.

So the original number is  53.

We can check this  as follows

Original number is 53 so the reverse is 35 .

53 - 35 = 18  which checks out.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

98%

step-by-step explanation: