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alexandr402 [8]
2 years ago
7

Q8 John bought 300 shares of stock in March 2018 and sold all

Mathematics
1 answer:
inessss [21]2 years ago
5 0
Is there a picture that I can see of the question
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This is a System Of Equations and I'd like it to get solved by the Elimination or Substitution Method.x+2y=83x+5y=8
Sonbull [250]

Answer:

x=133 y=-25

Step-by-step explanation:

I'll do both ways for you. So let's start with Substitution:

With the sub method, you have to set both equations equal to each other by setting them equal to the same variable. Since there is no coefficient in front of both x's in both equations, that variable will be easiest to solve for.

x + 2y = 83    &    x + 5y = 8

Solve for x.

x = 83 - 2y     &    x = 8 - 5y

Once you have solved for x, set each equation equal to one another and solve for y now.

83 - 2y = 8 - 5y

Isolate all variables to one side:

83 = 8 - 3y

Now subtract the 8 to fully isolate the y variable:

75 = -3y

Divide by -3:

-25 = y   Now that you have your first variable, plug it into one of the original equations and solve for x.

x + 2(-25) = 83

x - 50 = 83

x = 133

Now for the Elimination method. For this method you need to get rid of a variable by either subtracting/adding each equation together. Again, since you can subtract and x from both equations, you will be left with only the y variable to solve:

Put each equation on top of one another and subtract:

  x + 2y = 83

- (x + 5y = 8)

The x's will cancel out:

(x - x) + (2y - 5y) = (83 - 8)

Simplify:

-3y = 75

Solve for y

y = -25

Then, plug y = -25 into one of the original equations:

x + 5(-25) = 8

Solve for x:

x - 125 = 8

x = 133

Hope this helps!

8 0
2 years ago
PLS HELP 10 brain list
loris [4]

Answer:

y:))))))))))))))))))))

6 0
3 years ago
please factor completely !Thank yoy
Vilka [71]
You can download the app photo math and that will help you
8 0
3 years ago
Janice used a 16-inch dowel and a 21-inch dowel to build a kite what is the perimeter of her kite
marusya05 [52]
16x2=32
21x2=42
32+42=54

the perimeter is 54
6 0
3 years ago
Round 8.36 to the nearest one decimal place
BartSMP [9]
8.4 because 6 would round up to 10 and 10+30 =40 for 8.40 or just 8.4
4 0
3 years ago
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