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Crazy boy [7]
3 years ago
11

-9+t=12 will award brainliest

Mathematics
2 answers:
Vinvika [58]3 years ago
5 0

Answer:

t=21

Step-by-step explanation:

rodikova [14]3 years ago
5 0

Answer:

T=21

I USED PHOTO MATH UWU

Step-by-step explanation:

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Answer:

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Use nCr to figure this out, plug in the numbers and probabilities and solve

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Determine if the following system of equations has no solutions, infinitely many
FrozenT [24]

Answer:

infinitely many solutions

Step-by-step explanation:

x + 6y = -5

3x + 18y = -15

Multiply the first equation by 3

3(x + 6y) = -5*3

3x + 18y = -15

The two equations are identical.  This means they have infinite solutions along the line x+6y = -5

8 0
3 years ago
N^2- 5n +4=0 quadratic equation
luda_lava [24]

Answer:

n = 1, 4

Step-by-step explanation:

Step 1: Write equation

n² - 5n + 4 = 0

Step 2: Solve for <em>n</em>

<u>Factor:</u> (n - 4)(n - 1) = 0

<u>Find roots:</u> n = 1, 4

Step 3: Check

<em>Plug in n to verify if it's a solution.</em>

1² - 5(1) + 4 = 0

1 - 5 + 4 = 0

-4 + 4 = 0

0 = 0

4² - 5(4) + 4 = 0

16 - 20 + 4 = 0

-4 + 4 = 0

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7 0
3 years ago
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Plllsssss help<br><br><br><br><br> –2(r – 3) + 7 ≥ 8
mr_godi [17]

Hi there! :)

<u>Answer:</u>

r ≤ 2.5


Step-by-step explanation:

<u>-2</u>(r - 3) + 7 ≥ 8

Distribute the "-2" to the entire parentheses → -2 × r = <u>-2r</u>  &  -2 × -3 = <u>6</u>

-2r <u>+ 6</u> <u>+ 7</u> ≥ 8

Add the similar terms together → 6 + 7 = <u>13</u>

-2r <u>+ 13</u> ≥ 8

Subtract "13" from each side of the inequality → 8 - 13 = <u>-5</u>

<u>-2</u>r ≥ -5

Divide each side of the inequality by "-2" → -5 ÷ -2 = <u>2.5</u>

<u>r ≤ 2.5</u> ⇒ Whenever you divide an inequality by a negative number, you must flip the inequality sign!!


There you go! I really hope this helped, if there's anything just let me know! :)

5 0
3 years ago
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