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Zolol [24]
3 years ago
5

Smart ppl i rly rly rly need your help on this please ! i dont get it!

Mathematics
1 answer:
elixir [45]3 years ago
3 0

Answer:

The first one is -2x^2 - 21x + 4, the second one is -15 (I think, not 100% sure), the third one is 4xyz + 3yz + 5x - 4 (also not 100% on this one)

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See attached picture for answer

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2x+y=8<br> y+3z=5<br> z+2w=1<br> 5w+3x=9<br><br> Find the solution to each variable
morpeh [17]

Answer:

  w = 0, x = 3, y = 2, z = 1

Step-by-step explanation:

You can use each equation to write an expression that will substitute into the next equation.

  y = 8 -2x . . . . from the first equation

  8 -2x + 3z = 5 . . . . . substituted into the second equation

  z = (-3 +2x)/3 . . . . . solved for z

  (-1 +2/3x) +2w = 1 . . . . . substituted into the third equation

  w = (2 -2/3x)/2 . . . . . solved for w

  5(1 -1/3x) +3x = 9 . . . . . substituted into the last equation

  4/3x = 4 . . . . . simplified, 5 subtracted

  x = 3 . . . . . . . . multiply by 3/4

  w = 0 . . . . . . . .value of x substituted into equation for w

  z = 1 . . . . . . . . value of x substituted into equation for z

  y = 2 . . . . . . . .value of x substituted into equation for y

The solution is (w, x, y, z) = (0, 3, 2, 1).

4 0
3 years ago
What is the value of the expression shown below, when p= 1 and q= 4
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Step-by-step explanation:

4 0
3 years ago
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The width of a rectangle is 1/2 of its length. what are the sides of the rectangle if its perimeter in 63 in?
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7 0
4 years ago
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4.
Roman55 [17]
Part A:What percentage of the total students surveyed like both watching television and reading?

The total amount of student is 230
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As a fraction it is 80/230
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Part A=34.7826%

Part B:What is the probability that a student does not like watching television also does not like reading?

On the table it shows 20

So the probability is 20/230

Part B=20/230

6 0
2 years ago
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