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Naya [18.7K]
3 years ago
14

Which equation results from adding the equations in this system? -8x+8y=8 3x-8y=-18

Mathematics
2 answers:
sergeinik [125]3 years ago
7 0

Answer:

Adding the equations will give you: -5x = -10 and the value of x is 2

Step-by-step explanation:

To solve the system of the equation;

-8x+8y=8  ______(1)

3x-8y=-18_______(2)

Adding equation (1) and equation (2) will result to a new equation;

-5x = -10      {That is; -8x + 3x = -5x        8y+(-8y)=0     8+(-18)=-10}

To further find the value of x, we will divide both-side of the equation by -5

-5x/-5  = -10/-5

(On the left-hand side of the equation, -5 at the numerator will cancel-out minus 5 at the denominator, leaving us with just x, while on the right-hand side of the equation minus ten will be divided by minus 5)

x = -10/-5

x =2

Therefore, adding equation 1 and equation two will result to : -5x = -10

and when you further simplify the value of x is 2

MrRa [10]3 years ago
3 0
Just Add the equations 
[ Remember, Like terms together ]

(-8x+3x) + (8y-8y) = (8-18)
-5x = -10

In short, Your Resulted Equation would be: -5x = -10
[ Can solve further, for coordinates ]

Hope this helps!
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the sum of three numbers is twenty. the second number is four times the first and the sum of the first and third is eight. what
8090 [49]
Let's call the three numbers x, y, and z. 


The numbers are 3, 12, and 5.
x + y + z = 20
y = 4x
x + z = 8
We can rewrite the first equation because y is 4x, so 
x + 4x + z = 20
5x + z = 20
And now we can use simultaneous equation rules to solve

5x + z = 20
x + z = 8

5x + z = 20
5x + 5z = 40
(subtract)
-4z + -20
÷ -4
z = 5

x + z = 8
x + 5 = 8
x = 3

y = 4x
y = 4 × 3
y = 12

I hope this helps!
4 0
3 years ago
I have 7 red bows and 4 blur bows what is the ratio of red ribbons to blue ribbons PLEASE HELP ME
babymother [125]

Answer:

7:4

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Determine the equation of the circle with radius 99 and center (-1,-8)(−1,−8).
kumpel [21]
<h2>Equations of Circles</h2>

Generally, you'd see the equation of a circle organized in the following format:

(x-h)^2+(y-k)^2=r^2

  • (h,k) is the center
  • r is the radius

To determine the equation given the center and the radius:

  1. Plug both pieces of information into the general equation
  2. Simplify

<h2>Solving the Question</h2>

We're given:

  • Radius: 99
  • Center: (-1,-8)

Plug the radius and center into the equation as r and (h,k):

(x-(-1))^2+(y-(-8))^2=99^2\\(x+1)^2+(y+8)^2=9801

<h2>Answer</h2>

(x+1)^2+(y+8)^2=9801

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Jeremy buy a new computer with 14 optional features some of the features cost $28.50 and some cost $110.99 he if he spent a tota
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28.50 x + 1553.86-110.99x =811.45

combine like terms

-82.49x+1553.86=811.45

subtract 1553.86 from each side

-82.49x =-742.41

divide by -82.49

x=9

He bought 9 of the 28.50 features and 5 of the 110.99 features

4 0
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Which represents the domain of the relation {(–1, 4), (2, –3), (0, –2), (1, –3)}?
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