The sum of the digits in a two-digit number of s 8.the value of the number is 4 less than 5 times the ones digits. find the number.

26

Step-by-step explanation:

The ones digit is x. The tens digit is y.

"the sum of the digits in a two-digit number is 8"

x + y = 8

"The value of the number is 4 less than 5 times the ones digits.find the number."

10y + x = 5x - 4

Solve x + y = 8 for y:

y = 8 - x

Substitute in the second equation:

10(8 - x) + x = 5x - 4

80 - 10x + x = 5x - 4

-14x = -84

x = 6

x + y = 8

6 + y = 8

y = 2

The number is 26.

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

answer is because 4×10=40

and 98×4= is 392

40,392