Mathematics, 23.02.2020 21:35 megaboy

Algebra I PRAPT61911378710-1 Blackmore - NISO Algebra 1 3rd Nine Weeks
Welcome, Titus
Imagine
Pre
u
ded
Practice
Solving Systems of Linear Equations - Item 31353
Question 3 of 7
Derrick adds equations A and B to solve this system of equations. What makes this
approach a valid method in general for solving a system of equations?
Refere
Equation A: 5x + 4y = 24
Equation B: 3x - 4y - 16
&x40
CHECK
As long as addition is used on both sides or subtraction is
used on both sides, a true equation will remain true.
Language
Adding a quantity like 5z + 4y to one side of an equation
and another quantity like 24 to the other side maintains
the equality if the two quantities are equal.
ENGLISH
Because the y-terms cancel:
The method will give the correct solution, I = 5 and
y=-1
(5z + 4y)+(3x - 4y)=5z + 3x + 4y - 4y = 8z
5(5)+(-4)= 24

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 16:30, mohd591

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

Answers: 1

continue

Mathematics, 21.06.2019 20:30, phamleson8697

Will give let f(x)=2x and g(x)=[tex]2^{x}[/tex] graph the functions on the same coordinate plane. what are the solutions to the equation f(x)=g(x) ? enter your answers in the boxes x=[? ] or x=[? ]

Answers: 1

continue

Mathematics, 22.06.2019 01:30, nickeymcorrea

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.

Answers: 1

continue

Mathematics, 22.06.2019 01:30, KaseyT

Your car's gasoline tank holds 18 gallons of gasoline. on a trip in canada, the tank is one-quarter full. you want to fill the tank. how many liters of gasoline are needed to fill the tank

Answers: 2

continue

You know the right answer?

Algebra I PRAPT61911378710-1 Blackmore - NISO Algebra 1 3rd Nine Weeks
Welcome, Titus
Im...