Welcome90 Welcome90

03-06-2020
Mathematics

contestada

The sum of two numbers is 39. Their difference is 21. What are the two numbers?

Respuesta :

03-06-2020

Answer:

30 and 9

Step-by-step explanation:

x+y=39 , x-y=21

Solve for x:

x+y=39 , x-y=21

x= 30

Substitute x with 30:

(30)+y=39 , (30)-y=21

Solve for y:

y=9

Answer Link

OkBroomar OkBroomar

03-06-2020

Answer:

30 and 9

Eeexplination;

Answer Link

Otras preguntas

In the 1950s, politicians worried the favelas were a breeding ground for what group?

The perimeter of the base of a right square pyramid is 36 cm. The height of the pyramid is 9. What is the volume of the pyramid? A) 704 cm^2 B) 576 cm^2 C) 243

Which of the following is a method used by atoms to form a chemical bond? Merging electrons Merging protons Sharing electrons Sharing protons

How many times larger is 9 x 10^9 than 3 x 10^-4? ALSO HOW DO YOU SOLVE THIS TYPE OF PROBLEM? :\

In what manner did instrumentalism modify primordialism?

Oakland has an elevation of 1,639 feet above sea level lake enriquilos elevation is 149 feet below sea level what difference in altitude beween is difference i

What does 2f(-x)-1 look like

How is the process of photosynthesis central to sustaining life on Earth? EXPLAIN.

What ways did thr british attempt to control its colonial territory in the americas?

Which one of the following services should not be performed by a home inspector? A. Reporting of information about necessary repairs B. Conference