1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elis [28]
4 years ago
11

Solve using elimination or substitution method

Mathematics
1 answer:
Jlenok [28]4 years ago
6 0

\left\{\begin{array}{ccc}y=\dfrac{2}{3}x+3\\2x-3y=-9\end{array}\right\\\\\text{substitute}\ y=\dfrac{2}{3}x+3\ \text{to the second equation}\\\\2x-3\left(\dfrac{2}{3}x+3\right)=-9\qquad|\text{use distributive property}\\\\2x+(-3)\left(\dfrac{2}{3}x\right)+(-3)(3)=-9\\\\2x-2x-9=-9\qquad|\text{add 9 to both sides}\\\\2x-2x=0\\\\0=0\qquad TRUE\\\\Answer:\ \text{Infinitely many solutions}\\\\\left\{\begin{array}{ccc}x\in\mathbb{R}\\y=\dfrac{3}{2}x+3\end{array}\Rightarrow\left(x,\ \dfrac{2}{3}x+3\right)\right

You might be interested in
Thecube of twice a number
lubasha [3.4K]
<h3>Answer:</h3>

The cube of twice a number is 2x^3.

4 0
3 years ago
3x-2y=13 and 2x+3y=-16
Marysya12 [62]
If youre trying to solve for the variables you have to solve for one of them in one equation first, so if you solved for x in 2x+3y=16 youd get x=8-(3/2)y. Then youd have to sub in that x for the x in the other equation so youd get 3(8-(3/2)y)-2y=13 then solve for y. Once you have the value of y it should be the same in both equations. Plug that new value of y into the equation of youre choosing then sove for x
5 0
4 years ago
What's the answer to this
Orlov [11]
The first one is B. (CPR) second is C. Third degree burn and the third is D. Save the container as is to assist rescuers. Hope this helped
3 0
3 years ago
Please help!! Can not figure this out!
mihalych1998 [28]

Answer:

Linear equation is: C=16.5x+45

Activation fee change would cost him less.

Step-by-step explanation:

you have the right rate: 16.50.

and the right activation fee: 45.

If they increase the activation fee by 50%, it will be 22.5+45 which equals 67.5.

Increasing the slope (monthly charge) by 10% would mean 16.5*10% which is equal to 1.65. Add this to the original slope (because it is increasing), and you will see that the new slope would be 18.15.

The two new equations would be C=18.15x+45 & C=16.5x+67.5

Then, because x stands for months, we know that there are 24 months in two years.

Plug in 24 for x in both equations, and the costs (in respective order to which I put them in), will be $480.60, and $463.50. Therefore, the activation fee change would be better for Bernice :) (also you made a mistake and you multiplied the inflated activation fee by 24 instead of the rate).

6 0
4 years ago
1. Billy's plant is at least 2 inches tall. Graph all the possible heights of the plant.
sergeinik [125]
Uh i’m not sure.. but i think it’s 5? if not i’m sorry
3 0
3 years ago
Read 2 more answers
Other questions:
  • Sarah had (x) dollars. Rachel had four times as much as Sarah. Addie had 10 dollars less than Sarah. How much money did they hav
    7·1 answer
  • Simplify: 3gh^2 x 4g^3h^3
    8·1 answer
  • What is the percent of change from 58 to 29?​ also thank you guys for helping me?
    6·1 answer
  • Anyone pls!!!!!!!!!!!!!!!!
    11·2 answers
  • Complete the equation of line who slope is five and Y intercept is zero, four
    7·1 answer
  • the ratio of girls to boys in a gym class is 1 to 2 if there are 30 students in the class how many girls are in the class?​
    8·2 answers
  • Point A, located at (-2, 4), is translated down 6 units. What are the coordinates of A'?
    15·2 answers
  • The y intercept is (0,3)?
    15·1 answer
  • PLEASE HELP
    6·1 answer
  • Please I neeed help
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!