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defon
2 years ago
11

Find the solution of the system of equations. 3x-8y = 193x + 5y = -46​

Mathematics
1 answer:
sattari [20]2 years ago
4 0

(-7,-5)

Step-by-step explanation:

3x-8y = 19

minus

3x + 5y = -46

0x - 13y = 65

- 13y = 65

÷-13

y = - 5

Substitute y = - 5 into one of the functions:

3x-8y = 19

-8 x - 5 = 40

3x + 40 =19

-40

3x. = - 21

÷3

x= - 7

Solution is (-7,-5)

Hope this helps!

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Answer:

A

Step-by-step explanation:

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6 0
3 years ago
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Find the volume of the solid whose base is the region Ix I Iy I < 1 and whose vertical cross sections perpendicular to the y-
gavmur [86]

Answer:

volume of the solid = \frac{\pi }{3}

Step-by-step explanation:

As given , the region : |x| + |y| \leq 1

when y \geq 0 ,

|x| + y = 1

⇒|x| = 1 - y

when y ≤ 0 ,

|x| - y = 1

⇒|x| = 1 + y

The given region is the rectangle with sides (0, 5) , (0, -5), (5, 0), (-5, 0)

As given , the vertical cross section are semicircle

As we know that the area of semi circle  = \frac{1}{2}\pi  x^{2}

Now,

Volume = \int\limits^0_-1    {\frac{\pi }{2} (1+y)^{2}  } \, dy + \int\limits^1_0    {\frac{\pi }{2} (1-y)^{2}  } \, dy

            = \frac{\pi }{2} (\frac{(1+y)^{3} }{3} ) - \frac{\pi }{2} (\frac{(1-y)^{3} }{3} )

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4 0
3 years ago
Darias bought 5 school binders that cost $8.00 per
Natalka [10]

Answer:

$25.44

Step-by-step explanation:

First, find the original cost of the binders:

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= $40

Find the cost with the 40% discount:

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Find the cost with the 6% sales tax:

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So, the total cost of the binders was $25.44

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2 years ago
I have 12 coins x of them are R5 coins and the rest are R1 coins. An expression in the in terms of x for the number of R1 coins
Marrrta [24]

Answer:

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Step-by-step explanation:

hope u can do..

7 0
3 years ago
What is the value of cos A?
BlackZzzverrR [31]

Step-by-step explanation:

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its yr ans

hope it helps.

<h2>stay safe healthy and happy....</h2>
3 0
3 years ago
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