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kondaur [170]
2 years ago
11

Show the steps to solve the system of equation. x-2y+3z=-4 , 3x+y-z=0 , 2x+3y-5z=1

Mathematics
1 answer:
Taya2010 [7]2 years ago
8 0

Answer:

x= -1,  y = 6,  z = 3

Step-by-step explanation:

let me solve it with Gaussian Elimination

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By using double inequality describe all the numbers that are:
atroni [7]
Question is -5 and -3
8 0
3 years ago
Amy mows 7 lawns in 4 hours. How long does it take her to mow one lawn? Round your answer to the
Hitman42 [59]

Answer:

1.75

Step-by-step explanation:

7 divided by 4 where yo would get 1.75 and it is already rounded to the nearest hundreth ( im a 6th grader not positive if i got it right)

7 0
3 years ago
Which products result in a difference of squares? Check all that apply. (x – y)(y – x) (6 – y)(6 – y) (3 + xz)(–3 + xz) (y2 – xy
kondaur [170]
<span>difference of squares formula:
</span>a^2<span> – b^</span>2<span> = (a + b)(a – b)

</span>so answers are

<span>(3 + xz)(–3 + xz)
</span><span>(y2 – xy)(y2 + xy)
</span><span>(64y2 + x2)(–x2 + 64y2)
</span><span>

cause
</span><span>(3 + xz)(–3 + xz)
= </span><span>(xz + 3 )(xz - 3)
= x^2z^2 - 9

--------------
</span>(y^2 – xy)(y^2 + xy)
= y^4 -x^2y^2

----------

<span>(64y^2 + x^2)(–x2 + 64y^2)
=</span>(64y^2 + x2)(64 - x^2)<span>
= 64^2 y^4 - x^4</span>
4 0
3 years ago
PLEASE ANSWER! I WILL BRIANLIEST.
Brut [27]
Let x be the required waranty period, then
P(X < x) = P(z < (x - 12)/(8/12)) = 1 - 0.067 = 0.933
P(z < 12(x - 12)/8) = P(z < 1.498)
12(x - 12)/8 = 1.498
x - 12 = 8(1.498) / 12 = 0.9987
x = 12 - 0.9987 = 11

Therefore, they should waranty for 11 years so that no more than 6.7% fail within that time.

cost of production = %13
Let the price be p, then
revenue less price of failed iron = p - 0.067(13) = p - 0.871
Profit = p - 0.871 - 13 = 5
p - 13.871 = 5
p = 5 + 13.871 = 18.871

Therefore, the should charge $18.87 per waffle iron.
5 0
3 years ago
Find A cup(B cap C) . A = \{1, 4, 6, 7\}; B = \{3, 4, 5\}; C = \{2, 4, 8\}; \{1, 4, 6, 7\} 4 } \{1, 2, 3, 4, 5, 6, 7, 8\}
Inessa05 [86]

The only common element between B and C is 4, so B ∩ C = {4}.

4 is also already contained in A, so B ∩ C is a subset of A, and thus

A U (B ∩ C) = A = {1, 4, 6, 7}

5 0
2 years ago
Read 2 more answers
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