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3 years ago

Use substitution to solve the system. -5x + 3y = 19 x = 3y - 11

Mathematics

1 answer:

telo118 [61]3 years ago

5 0

Answer:

x = -2

y = 3

Step-by-step explanation:

-5x + 3y = 19

x = 3y - 11

-5x + 3y = 19

-5(3y - 11) + 3y = 19

-15y + 55 + 3y = 19

-15y + 3y + 55 = 19

-12y + 55 = 19

-12y = 19 - 55

-12y = -36

y = -36/-12

y = 3

x = 3y - 11

x = 3(3) - 11

x = 9 - 11

x = -2

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Answer:

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Step-by-step explanation:

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3 years ago

****WILL GIVE BRAINLIEST TO FIRST ANSWERER****

xz_007 [3.2K]

Let's plug in each coordinate and see what we get:

(2, 0, 0)
-> 2A + 0 + 0 = D
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(0, 0, 5)
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plugging this back into the equation:
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multiply through by 30

so we get
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Second question

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This gives us our measurements, or dimensions: 3 x 4 x 4.
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3 years ago

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Step-by-step explanation:

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When it is a binomial, it usually is something like x+2

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2 years ago

Use the Midpoint Rule with n = 10 to approximate the length of c(t) = (5 + sin(4t), 6 + sin(7t)) for 0 ≤ t ≤ 2π. (Round your ans

sukhopar [10]

Answer:

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Step-by-step explanation:

A differential of length in terms of t will be ...

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where ...

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The length of c(t) will be the integral of this differential on the interval [0, 2π].

Dividing that interval into 10 equal pieces means each one has a width of (2π)/10 = π/5. The midpoint of pieces numbered 1 to 10 will be ...

(π/5)(n -1/2), so the area of the piece will be ...

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It is convenient to let a spreadsheet or graphing calculator do the function evaluation and summing of areas.

The attachment shows the curve c(t) whose length we are estimating (red), and the differential length function (blue) we are integrating. We use the function p(n) to compute the midpoint of the sub-interval. The sum of sub-interval areas is shown as 34.43.

The length of the curve is estimated to be 34.43.