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
Vlada [557]
3 years ago
10

Solve system of equations for x + y: -4x + 9y = -11 & -3x + 7y =-9

Mathematics
1 answer:
Aloiza [94]3 years ago
8 0

Answer:

x = -3   and   y = -4

x + y = -3-4 = -7

Step-by-step explanation:

-4x + 9y = -11 ------------------------------------------------------------------------(1)

-3x + 7y = -9--------------------------------------------------------------------------(2)

multiply through  equation (1) by 3   and multiply through equation(2) by 4

-12x + 27y = -33 -----------------------------------------------------------------------(3)

-12x + 28y   = -36 ----------------------------------------------------------------------(4)

subtract equation (1) from equation (2)

y = -3

substitute y = -3 into equation (2)

-3x + 7(-3) = -9

-3x -21 = -9

add 21 to both-side of the equation

-3x -21 + 21 = -9 + 21

-3x = 12

divide both-side of the equation by -3

-3x/-3 = 12/-3

x = -4

x = -3   and   y = -4

You might be interested in
PLEASE ANSWER ASAP!!!! WILL GIVE BRAINLEST TO CORRECT ANSWER!!!
Irina18 [472]
50° is the answer to your question.
8 0
3 years ago
Read 2 more answers
A. Equilateral<br> B. Right<br> C. Obtuse<br> D. Acute<br> E. Scalene
faltersainse [42]

<u>Answer:</u>

A) Scalene E) Obtuse


<u>Detailed Explanation:</u>


A) Scalene



This triangle would be classified as scalene because none of the angles are equal.


____________________________________________________________



E) Obtuse



This triangle would be classified as an scalene triangle because one of the angles is larger than 90 degrees.



8 0
3 years ago
Read 2 more answers
2. Dr. Scott bought 3 pound of oranges for $1.50. How much would 7
n200080 [17]

Do 1.50 divided by 3 to get the unit price.

6 0
3 years ago
The range of the function
Naily [24]

Answer:

Range: {-4, 3, 5}

Step-by-step explanation:

The range of a function includes all the set of possible output, or y-values in a given data set of a function.

Thus, the range of the function, {(2, 3), (-3, 5), (6, -4)} includes 3, 5, and -4.

This can be written as:

Range: {-4, 3, 5}

7 0
3 years ago
What is the value of the expression, written in standard form? (6.6x10^-2)/(3.3x10^-4)
Eduardwww [97]
0.066/0.00033
The answer is 200.
4 0
2 years ago
Read 2 more answers
Other questions:
  • 1. A sine function has the following key features:
    12·2 answers
  • A local grocer cut his marketing budget by 38% last year. He spent only $650 on marketing this year and is happy with his decisi
    11·1 answer
  • What is the answer ​
    12·2 answers
  • Simplify 13 – 8x – 10 + 5x
    8·2 answers
  • Paul is a married taxpayer and claims 2 withholding allowances. He earns $575 per week. He estimates that he will spend $50 each
    7·1 answer
  • Find the mean and median for this set of number: 80, 70, 60, 40, 80.
    9·2 answers
  • Find the Mid point of (-5,-9) (-7,-4)
    8·1 answer
  • Help me with this please
    13·2 answers
  • You take a 4" high by 6" wide photo. You like it so much that you enlarge it to a 123" wide poster. How tall must the poster be?
    8·1 answer
  • PLS HELP! ONLY IF YOUR 100% SURE PLS ANSWER NO PHONY ANSWERS PLS PLS PLS
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!