What two numbers add up to 45 and multiply and get 121

1 answer:

4 0

Let the two numbers be x and y.

We have x+y=45
⇒ y= 45-x.

The two numbers multiply and get 121, so we have another equation:
x*y = 121 (1)

Plug y= 45-x in (1), we have:
x* (45-x)=121
⇒ 45x - x^2 = 121 (distributive property)
⇒ x^2 - 45x = -121 (multiply -1 on both sides)
⇒ x^2- 45x + 121= 0
⇒ x= 42.128 or x= 2.872

y= 45- 42.128= 2.872
or y= 45- 2.872= 42.128.

Because it does not matter what number, x or y, is larger, the two numbers are 2.872 and 42.128.

Hope this helps~

You might be interested in

3b - c +5 if c= - 4, b=2.

AnnZ [28]

Answer:

Step-by-step explanation:

To find the answer, plug the values of each variable into the equation and simplify. It may be easiest to plug one variable in at a time, simplify, then plug the next variable in. Remember, if the equation is asking you to subtract a negative number, the negatives cancel and you want to add the numbers.

b = 2 c = -4

3b - c + 5 <----- Original expression

3(2) - c + 5 <----- Plug 2 in for "b"

6 - c + 5 <----- Multiply 3 and 2

11 - c <----- Add 6 and 5

11 - (-4) <----- Plug -4 in for "c"

15 <----- Add 11 and 4

3 0

1 year ago

Robert earns $300 each week. What equation shows the relationship between salary per week (s), number of weeks worked (w), and t

Travka [436]

For the answer to the question above asking what equation shows the relationship between salary per week (s), number of weeks worked (w), and total income (t) of Robert who earns 300 dollars per week?

The answer would be the equation is: t= s x w

8 0

3 years ago

Function A and Function B are linear functions. Compare the two functions and choose all that are correct.

Olegator [25]

Answer:

2 .The slope of Function A is less than the slope of Function B

Step-by-step explanation:

A graph of Function A shows it has a y-intercept of 4, the same as that of Function B. (Statements 3 and 4 are not correct.)

The slope of Function A is 2, which is less than the slope of 3 that Function B has. (Statement 2 is correct; statement 1 is not.)

_____

More detailed working

The slope of Function A can be figured easily between the points with x-values that differ by 1: