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sdas [7]
4 years ago
13

2х - бу = 2x + бу = 28​

Mathematics
1 answer:
scZoUnD [109]4 years ago
7 0

Answer:

x = 10

y = 3

Step-by-step explanation:

Given

2x - 6y = 2

x + 6y = 28

Add both equations

2x + x -6y + 6y = 2 + 28

3x = 30

Divide both sides by 3

x = 30/3

x = 10

Substitute 10 for x in either equations to get y

Using equation 2 , we have

x + 6y = 28

10 + 6y = 28

Subtract 10 from both sides

10 - 10 + 6y = 28 - 10

6y = 18

Divide both sides by by 6

y = 18/6

y = 3

Therefore

x = 10

y = 3

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Solving Rational Inequalities and use sign diagram to sketch the graph. Image attached for better understanding.
hjlf

Answer:

x ∈ (-∞ , -2) ∪ (1, 3)

Step-by-step explanation:

The expression is already factored. Note that for the polynomial that appears in the numerator (x-3)(x + 2) there are 2 roots:

x = 3\\x = -2

For the polynomial that appears in the denominator there is 1 root:

x = 1

Note that x = 1 does not belong to the domain of f(x) because it zeroes the denominator of the function and the division between zero is not defined.

With these three roots we do the study of signs to find out when f(x)

Observe the attached image

Note that:

(x-3) when x

(x + 2) when x

(x-1) when x

Finally, we have the solution:

x ∈ (-∞ , -2) ∪ (1, 3)

5 0
4 years ago
Hannah deposited the same amount of money into her savings account each month after 5 months she had $2,550 into the savings acc
DiKsa [7]

Answer:

  • a = 250x + 1300

Step-by-step explanation:

We have pairs (5, 2550) and (8, 3300)

<u>Find the rate of change:</u>

  • (3300 - 2550)/(8 - 5) =
  • 750/3 =
  • 250

$250 is the amount added to savings account every month

<u>Initial amount was:</u>

  • 2550 - 5*250 =
  • 2550 - 1250 =
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<u>Since the change is linear and we have y-intercept and slope, we can show the amount after x months as:</u>

  • a = 250x + 1300
5 0
3 years ago
How much will the window cost?
vekshin1

Answer:

$672

Step-by-step explanation:

First find the area so:

5*4=20ft

2^2*3.14=12.56ft

20+12.56=32.56ft

Second find the price for the area:

32.56*12=$672

Hopefully it's correct!

3 0
3 years ago
Jamal borrowed $316 for nine months. He paid it off by paying $38.27 monthly.
Doss [256]
$28.43 is the answer
7 0
3 years ago
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I do not know what equals 19 in times
Kisachek [45]
1 x 19 = 19
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4 x 4.75 = 19

8 0
4 years ago
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