marica24 marica24

03-10-2018
Mathematics

contestada

if (3,n) is a solution of Ax+3y=6 and (n,5) is a solution of 5x+y=20,what is the value of A?

Respuesta :

crisforp crisforp

03-10-2018

We have 3A + 3n = 6 and 5n + 5 = 20;

Then, 5n = 15;

n = 3;

Finally, 3A + 9 = 6;

3A = -3;

A = -1;

Answer Link

Otras preguntas

What group of people was taken to America and sold as slaves?

An art gallery has 9 paintings to display along a hallway. How many different ways can they choose and display 6 of the paintings?

When lithium reacts with bromine to form the compound LiBr each lithium atom (1) gains one electron and becomes a negatively charged ion (2) gains three electro

In an oxidation-reduction reaction, the number of electrons lost is (1) equal to the number of electrons gained (2) equal to the number of protons gained (3) le

Where is the Statue of Liberty?

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine

What was one important thing that Abraham Lincoln did?

What group of people was taken to America and sold as slaves?

The coefficients in a balanced chemical equation represent (l ) the mass ratios of the substances in the reaction (2) the mole ratios of the substances in the r

What type of formula represents the simplest whole number ratio of atoms of the elements in a compound? (1) molecular formula (2) condensed formula (3) empiric