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
skad [1K]
3 years ago
7

Solve each system by elimination 5x-6y=6 -5x+4y=-14

Mathematics
1 answer:
Shalnov [3]3 years ago
5 0

Answer:

Step-by-step explanation:

the good part about this one is if u look, u can see that u have a positive 5x and a negative 5x....when added, these will cancel out....so u dont have to multiply ur equations by anything, u just have to add them

5x - 6y = 6

-5x + 4y = -14

---------------------add

-2y = - 8

y = -8/-2

y = 4

now sub 4 in for y in either of the original equations

5x - 6y = 6

5x - 6(4) = 6

5x - 24 = 6

5x = 6 + 24

5x = 30

x = 30/5

x = 6

lets check it...

-5x + 4y = -14

-5(6) + 4(4) = -14

-30 + 16 = -14

-14 = -14 (correct)

so it checks out.....x = 6 and y = 4 or (6,4) <===

You might be interested in
Write the quadratic equation in general form.<br><br> (x - 3) 2 = 0
garri49 [273]

Answer:

x² - 6x + 9 = 0

Step-by-step explanation:

Given

(x - 3)² = 0 ( expand left side using FOIL )

x² - 3x - 3x + 9 = 0 ( collect like terms )

x² - 6x + 9 = 0 ← in general form

5 0
3 years ago
Find the area of a regular pentagon with an apothem of 6 inches and a side length of 8.7 inches. Round to the nearest tenth.
Lapatulllka [165]
  1. The area of the pentagon is 130.5 inches. The area of a pentagon, if you don’t know, is equal to the perimeter of the pentagon times the apothem, all divided by 2. Because one side of the pentagon has a length of 8.7 inches, and all sides of a pentagon have the same length, then the perimeter would be equivalent to 8.7 times 5, which equals a perimeter of 43.5 inches. Now that our perimeter is found, our equation is set (because the apothem is 6 inches, as said in the problem). Now, to solve, we have to multiply the perimeter (43.5 in.) by the apothem (6 in.), which equals 261 inches. Now, all we have to do is divide it by 2, which will give us our answer of 130.5 inches. Bonus: The answer only reaches out to one decimal point, meaning that there is no need to round!
5 0
3 years ago
If isosceles triangle ABC has a 130° angle at vertex B, which statement must be true?
OLga [1]
The some of an Isosceles triangle is 180.

if vertex B = 130 degrees then the other two must be equal 50 degrees.  so you divided 50 by 2 which equals 25.

in this case you have 2 points which equal 50. so you take the one which is the closest to 25. which is the last point. m<A = 20 and m<C + 30.
I hope this is right.
6 0
4 years ago
The graph shows two lines, A and B:
ladessa [460]

Answer:

the answer is (3,4) is the solution to line A but to not line B

8 0
2 years ago
How to solve using Substitution or Elimination??? Help!! <br> y=3x-1<br><br> y=2x+2
aliina [53]

Answer:

Step-by-step explanation:

Since both equations equals y, then both equations equal each other.

3x - 1 = 2x + 2

Subtract 2x from both sides

x - 1 = 2

Add 1 to both sides

x = 3

Plug x = 3 into one equation(doesn't matter which)

y = 3x - 1

y = 3(3) - 1

y = 9 - 1

y = 8

5 0
3 years ago
Read 2 more answers
Other questions:
  • I forgot how to do these. Please help!
    7·1 answer
  • A typical adult human body contains approximately 2.500 L of blood plasma. How many grams of blood plasma are in the typical adu
    11·1 answer
  • Look at the stacked bar chart in figure 3.35. which of the following is a category on the category axis?
    5·1 answer
  • What is 7.3 x 27.4 = ?
    13·1 answer
  • A cylinder was enlarged by a scale factor of 4. The new volume is 2,240 cubic units. What was the volume of the original cylinde
    5·1 answer
  • 3/4(x + 3) = 9<br><br><br> How do I solve this
    13·1 answer
  • How do i factor equations?
    12·1 answer
  • Which are equivalent to 3
    11·2 answers
  • Lisa, Honey and Candy are three sisters. Honey is x years old. Lisa is five years older than Honey, Candy is 3 years younger tha
    12·1 answer
  • How are the locations (20, 7) and (20, -7) related?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!