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
Nesterboy [21]
3 years ago
10

-4x-2y=-12 and 4x+8y=-24 using addition/eliminatin method

Mathematics
2 answers:
ANEK [815]3 years ago
7 0
Use the elimination method:

-4x - 2y = -12
+4x + 8y = -12
--------------------
 0  + 6y = -24

6y = -24
6y/6 = -24/6
y = -4

Plug in -4 for y in one of the equations
-4x - 2y = -12
-4x - 2(-4) = -12
-4x + 8 = -12
-4x + 8 (-8) = -12 (-8)
-4x = -20
-4x/-4 = -20/-4
x = 5

x = 5, y = -4

hope this helps
Nostrana [21]3 years ago
6 0
Elimination method is best because one equation has 4x and the other has -4x. Add the two equations together.

 -4x - 2y = -12
+4x + 8y = -24
----------------------
   0 + 6y = - 36

divide by 6 both sides 
y = -6 

use this to find x in either equation.
4x + 8(-6) = -24
4x  - 48 = -24
4x = -24 + 48
4x = 24
x = 6

You might be interested in
How do you 3rd root a number
zepelin [54]
Ex: 7^3=(7×7×7) --- 7×7=49×7=343
7 0
3 years ago
Last year, James earned £1,100 per month. This year, he's had a 4% increase in his monthly pay. He worked 40 hours per week for
avanturin [10]

Answer:

A = £7.15 per hour

James' average pay per hour this year is £7.15 per hour

Step-by-step explanation:

Given;

Last year pay = £1,100 per month

This year, he's had a 4% increase in his monthly pay

This year pay P = 1,100 + 4% of 1,100 = 1,100 +1,100(0.04)

This year pay P = £1,144 per month

Yearly pay Tp= 12 × P = 12 × £1,144 = £13,728

Number of hours worked this year;

He worked 40 hours per week for 48 weeks in the year

N = 40 hours per week × 48 weeks per year

N = 1920 hours per year

Average pay per hour this year A;

A = Yearly pay/Number of hours worked this year

A = Tp/N

A = £13,728/1920hours

A = £7.15 per hour

James' average pay per hour this year is £7.15 per hour

5 0
3 years ago
The product 33 × 90 is more than 32 × 90. How much more? Complete the explanation for how you know without multiplying.
Tju [1.3M]

Answer:

90, there are 32 ninetys in 32 X 90 and there are 33 ninetys in 33 X 90, meaning there is one more 90 in 33 X 90 than 32 X 90

5 0
2 years ago
Need help, I did a similar problem and got it wrong soo...
Karo-lina-s [1.5K]
Percent change = (new number - old number)/(old number) * 100

percent change = (54 - 48)/(48) * 100 = 6/48 * 100 = 0.125 * 100 = 12.5%
8 0
3 years ago
Read 2 more answers
A person owes a debt of $10
AleksandrR [38]
So the person is out of pocket of $10.00
6 0
3 years ago
Other questions:
  • Pls help, it's 20 points<br><br> OA bisects measure of (a) 23<br> (b) 75<br> (c) 78.5<br> (d) 157
    13·1 answer
  • Plz help me find 100th term!!!it is on the BOTTOM!
    14·1 answer
  • Really easy question pls healp emergency
    7·1 answer
  • if in a triangle, measure of angle A is 71 degrees, measure of angle B is 42 degrees, and BC= 8, find AC to the nearest hundredt
    10·1 answer
  • Anyone know? Will mark brainliest if correct!
    11·2 answers
  • -6 + y = -2 <br> Can someone tell me the answer and explain it to me
    11·2 answers
  • 7
    15·1 answer
  • Russell has 5 liters of a certain medicine. If it takes 2 milliliters to make 1 dose, how many doses can he make?
    11·1 answer
  • Brainliest if your first answer
    6·1 answer
  • Find the slope of the line that contains (−5,4) and (2,4).
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!