3 years ago

X + 3y < -18 5x + 2y <14

Mathematics

1 answer:

Kryger [21]3 years ago

4 0

Answer:

<h2>The solution will be the shaded region for both.</h2>

Step-by-step explanation:

First we need to solve x + 3y = -18 and 5x + 2y = 14.

$x = -18 - 3y$ .

Putting the above value in the second equation, we get, $5x + 2y = 14\\5(-18 - 3y) + 2y = 14\\-90 -15y - 2y = 14\\17y = - 104\\y = - \frac{104}{17} = 6.2$ .

Hence, $x = -18 - 3y = -18 -3\times\frac{104}{17} = -36.353$

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the sum of three times one number, x, and five times a second number,y, is 77. if the sum of the two numbers is 19, find the two

HACTEHA [7]

Answer:

x=9, y=10. (9, 10). The two numbers are 9 and 10.

Step-by-step explanation:

3x+5y=77

x+y=19

------------------

3x+5y=77

-3(x+y)=-3(19)

---------------------

3x+5y=77

-3x-3y=-57

-------------------

2y=20

y=20/2

y=10

x+10=19

x=19-10

x=9

5 0

3 years ago

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kherson [118]

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