ReverseOompaloompa ReverseOompaloompa

09-08-2017
Mathematics

contestada

Solve the system of equations: 10x + 7y = 49 and 10y – x = 70

Respuesta :

choixongdong choixongdong

09-08-2017

10x + 7y = 49
10y – x = 70 so x = 10y - 70

substitute x = 10y - 70 into 10x + 7y = 49
10x + 7y = 49
10(10y - 70) + 7y = 49
100y - 700 + 7y = 49
107y = 749
y = 7

x = 10y - 70 = 10(7) - 70 = 0

answer
(0, 7)

hope it helps

Answer Link

Otras preguntas

Mayors are the chief executive officers of local government units. How are mayors elected?

Select the correct locations on the periodic table.Which two elements have similar characteristics?

An explanation for the difference in amino acids between lamprey hemoglobin and human hemoglobin is

Two sides of a triangle have measures of 6 inches and 12 inches. Which measure could be the length of the third side?

Kristin bought eight boxes.A week later half of all her boxes were destroyed in a fire.There are now only 17 boxes left.With how many did she start

What are two main functions of the female reproductive system in the order in which they occur in the female life cycle

Number the steps of stellar evolution in the correct order

When we use ________ attributions, we infer that a person is behaving in a certain way or that an event is due to the situation that they are in. a. external

PLEASE HELP ASAP... Solve x3 = 125 over 27. 25 over 9 ±25 over 9 5 over 3 ±5 over 3

Solve the following system by any method please and thanks!

good job