show that (20,15) is a solution to the system of equations.
5x-2y=70
3x+4y=120

Question

Buddyrocks1999 Buddyrocks1999

06-03-2015
Mathematics

Answered

show that (20,15) is a solution to the system of equations.
5x-2y=70
3x+4y=120

Answer :

Other Questions

Lionel computed the average rate of change in the depth of a pool over a two-week interval to be zero. Which statement must be true?A. The pool must have been e

A story that ends with the expression "Anytime I remember that incident,I always shed tear"

Part 1 of 6We begin by first looking for rational zeros. We can apply the rational zero theorem because the polynomial has integer coefficients.[tex] n(x) = 3x^

2.When describing a variable, we often want to know its central tendency (i.e. mean, median, mode). What are the advantages and disadvantages of each of these m

100 POINTS PLS I NEED HELP ASAP How you would describe life in the colonies versus the image Americans have of the founding of America. What stood out to you? W

Consider the position function [tex]\( s(t) = -4.9t^2 + 32t + 22 \)[/tex].Complete the following table with the appropriate average velocities and then make a c

Shakespeare Macbeth English 9 sem 2

The answer should be 52. Does anyone know how to solve?

Which number produces an irrational number when added to [tex] \frac{1}{4} [/tex]?A. [tex]3.4641016 \ldots[/tex]B. [tex]-\frac{4}{9}[/tex]C. [tex]0.545454 \ldot

Simplify the expression:[tex]\[ \sqrt[3]{3^2 \times 5^2} \times 2 \sqrt[3]{3 \times 5} \][/tex]

do you agree with president carter that human rights concerns should steer U.S. foreign policy?why or why not?

volume finding help volume

For breakfast, Randy had two Egg Mc Muffins and a hash brown, totalling 750 calories. Jack only had one Egg Mc Muffin and a hash brown, totalling 450 calories.

Sally was analyzing samples of DNA. She had DNA samples from bacteria, a whale shark, a bald eagle, and a human. Just by looking at the structure and components

Frankie and Caitlin are trying to move a small four-wheeler out of their garage. Frankie pushes with a force of 40N towards the outside. Caitlin pulls with a fo

If the sperm gamete that fertilizes an egg has a(n) _____ chromosome, it will form female offspring. X Y XY XX

the length of a classroom is 34 feet what is this measurement in yards and feet

Identify the origins of rock-and-roll music, listing which musical genres it blends together, and name a person who was an important figure in its early develo

People learning English as a second language make mistakes when they apply the grammar of their native language to English. True False

Which scientist hypothesized that more offspring were born in a population than could survive based on limited resources?

konrad509 konrad509 · Answer 1 · 2015-03-06T11:37:46-05:00

konrad509 konrad509

06-03-2015

[tex]5\cdot20-2\cdot15=70\\ 100-30=70\\ 70=70\leftarrow \text{ true}\\\\ 3\cdot20+4\cdot15=120\\ 60+60=120\\ 120=120\leftarrow \text{ true}[/tex]

Answer Link

eu99li eu99li · Answer 2 · 2015-03-06T13:55:18-05:00

eu99li eu99li

06-03-2015

{5x-2y=70 /*2

{3x+4y=120

___________________

{10x-4y=140

{3x+4y=120 (+)

13x=260 /:13

x=20

3x+4y=120

3*20+4y=120

4y=120-60

4y=60 /:4

y=15

So the solution is (20; 15)

Answer Link

show that (20,15) is a solution to the system of equations. 5x-2y=70 3x+4y=120

Answer :

Other Questions

show that (20,15) is a solution to the system of equations.
5x-2y=70
3x+4y=120