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
bonufazy [111]
3 years ago
10

use the elimination method to solve the system of equations. choose the correct ordered pair. 7x+3y=30 -2x+3y=3

Mathematics
1 answer:
andreev551 [17]3 years ago
3 0

Answer:

x = 3, y = 3

Step-by-step explanation:

Elimination method to find x:

  (7x + 3y = 30) * -1      ===>                              -7x - 3y = -30

                                                                          -2x + 3y = 3                    

  add two equations to eliminate y             ______________

                                                                                 -9x = -27     ===>   x = 3

substitution to find y:  

  -2x + 3y = 3

  -2(3) + 3y = 3

  -6 + 3y = 3

  3y = 9

    y = 3

Elimination method to find y:

  (7x + 3y = 30) * 2         ===>                           14x + 6y = 60

  (-2x + 3y = 3)  * 7         ===>                         -14x + 21y = 21

  add two equations to eliminate x             ______________

                                                                              27y = 81      ===>   y = 3

You might be interested in
Problem 11-3 blair & rosen, inc. (b&r) is a brokerage firm that specializes in investment portfolios designed to meet th
Artyom0805 [142]

Linear programming which shows the best investment strategy for the client is Max Z=0.12I +0.09B and subject to constraints are :I+ B<=25000,

0.005 I +0.004B<=250.

Given maximum investment client can make is $55000, annual return= 9%, The investment advisor requires that at most $25,000 of the client's funds should be invested in the internet fund. The internet fund, which is the more risky of the two investment alternatives, has a risk rating of 5 per thousand dollars invested. the blue chip fund has a risk rating of 4 per thousand dollars invested.

We have to make a linear programming problem.

Let

I= Internet fund investment in thousands.

B=Blue chip fund  investment in thousands.

Objective function:

Max Z=0.12I+0.09B

subject to following constraints:

Investment amount: I+ B<=25000

Risk Rating: 5/100* I+4/100*B<=250 or 0.005 I +0.004B<=250

I,B>=0.

Hence the objective function is Max Z=0.12 I+ 0.09 B.

Learn more about LPP at brainly.com/question/25828237

#SPJ4

3 0
1 year ago
Does this table represent an exponential function x 1 2 3 4 y -1 -8 -27 -64
k0ka [10]

\bf \begin{array}{ccll}&#10;x&y\\&#10;\cline{1-2}&#10;1&\stackrel{-1^3}{-1}\\\\&#10;2&\stackrel{-2^3}{-8}\\\\&#10;3&\stackrel{-3^3}{-27}\\\\&#10;4&\stackrel{-4^3}{-64}\\\\&#10;x&-x^3&#10;\end{array}~\hspace{5em}\boxed{y=-x^3}~~\checkmark

4 0
2 years ago
A system of equations is shown below. Find the solution by using substitution.
ASHA 777 [7]

Answer:

a) (-2, 0)

Step-by-step explanation:

x + 2 = 3x + 6

-3x - 3x

___________

−2x + 2 = 6

- 2 - 2

_________

4 = −2x

_ ___

−2 −2

-2 = x [Plug this back into both equations above to get the y-coordinate of 0]; 0 = y

I am joyous to assist you anytime.

5 0
3 years ago
Find the missing side of the triangle​
artcher [175]

Answer:

12

Step-by-step explanation:

Use pythag to solve.

x^2+5^2=13^2

x=12

4 0
2 years ago
An ice cream store sells 2 ​drinks, in 4 ​sizes, and 6 flavors. In how many ways can a customer order a​ drink?
laiz [17]
The answer is 48 different ways.
6 0
3 years ago
Other questions:
  • WILL GIVE BRAINLIEST! Someone please graph these, I can't graph them.
    8·2 answers
  • What is the solution set
    6·1 answer
  • there are 26 times in Washington high school as teachers.when all the teachers and students are seated in the 900 seat school au
    15·1 answer
  • Victor earns a gross annual income of $64,570 and is buying a home for $125,340. He is making a 15% down payment and financing t
    6·1 answer
  • A rectangular tank with a square base is 1/4 full of water the side lengths of the square bases 20 inches one another 3000 cubic
    8·1 answer
  • How to solve -5(x-3)=-25
    13·2 answers
  • The inverse of G(x) is a function.<br> A. True<br> B. False
    6·1 answer
  • Date:
    9·1 answer
  • I really need help with this
    6·1 answer
  • Solve y=x+5 and 2x-3y=4
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!