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
inn [45]
3 years ago
9

Substatution and elimination

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
6 0
Well using elimination is easy because they basically did it for you. 
4x-5y=-6
2x+5y=12
The postive 5y and negative 5y cancel out because -5y plus 5y is zero.
so you are left with
4x=-6
2x=12
Add these together
6x=18
divide both sides by 6 and Solve to find your x
x=3
Now we have to eliminate x to find y.
we multiply the second equation by -2 so it can cancel out so
(2x+5y=12)-2
-4x-10y=24
Add the equations together
4x-5y=-6
-4x-10y=24
You are left with -15y = 30
Solve for y
y = -2
So your final answer for the elimination would be 
(3,-2)
You might be interested in
A keycode must contain 2 letters and 3 numbers. The letters may be any letter of the alphabet. The numbers should be any number
OverLord2011 [107]
The English alphabet contains 26 letters (a, b, c, ...y, z). 

The digits from 0 to 9 are a total of 10.


A keycode contains 2 letters, and 3 numbers, for example:

AB 598;  MM 139;    NT 498; ...


So there are 26 possible choices for the first letter, which can combined with any of the 26 possible choices for the second letter, so there are a total of 

26*26=676 possible pairs of letters.


Similarly, the 10 possible choices for the first number, which can be combined with the 10 possible choices for the second number, and the 10 possible choices for the third number make a total of :

10*10*10=1,000 possible triples of numbers.


Any of the 676 possible pairs of letters can be combined with any of the possible 1,000 triples of numbers. This makes a total of 

676*1,000=676,000 keycodes.


Answer: 676,000
8 0
3 years ago
Read 2 more answers
Is 50 pens for 5.00 a rate or unit rate
notsponge [240]
Unit rate if your finding how much one cost.
4 0
3 years ago
Find the measure of c
guajiro [1.7K]

Answer:

B is the correct answer of this question

3 0
3 years ago
Which is 2/3 of 225 ?
Leya [2.2K]
2/3 of 225

= 2/3 x 225 

= 150
3 0
3 years ago
Read 2 more answers
The total value of the money in her piggy bank is $7.75. If Brielle has 63 nickels, write and solve a linear equation to find th
Nataly [62]
Didhzhsuwuebxhxhudsdhdhdidee
4 0
3 years ago
Other questions:
  • Gregory's front porch is rectangular. The length is 8 feet more than the width. The perimeter of the porch is 52 feet. What is t
    7·1 answer
  • Use the order of operations to simplify the expression: 23 + 5 × 10 ÷ 2 – 33 + (11 – 8)
    14·2 answers
  • The cylinders are similar the volume of the larger cylinder is 1600 cubic centimeters what is the volume of the smaller cylinder
    13·1 answer
  • True or false a system of equations including a line and a parabola can have only 2 solutions
    15·1 answer
  • If P(event A) = 0.25, what is P(not event A)?
    12·1 answer
  • Six is 20% of what number?
    13·1 answer
  • How many centimeters are equal to 5 inches?
    14·2 answers
  • Simplify the expression (3a^4) (-6a^3) 
    7·2 answers
  • A hairstylist schedules 14 hour to trim a customer's hair and 16 hour to style the customer's hair. The hairstylist plans to wor
    12·1 answer
  • What are the transformations for this quadratic function y= 3 (x+4) power of 2 -8
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!