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Lady_Fox [76]
4 years ago
5

1. 8 - n = -4

Mathematics
1 answer:
iogann1982 [59]4 years ago
4 0

Answer:

1.-n=-12; n=12

2.18=-2x; x=-9

3.-n=-12; n=12

4.b=3


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The quadrilateral ABCD on a coordinate plane has the following characteristics.
kirza4 [7]

Answer with explanation:

Property of Quadrilateral A B CD

⇒Equation of Line AD is, y= -3 x.

⇒Equation of Line BC is, y= -3 x +11

Coordinates of CD = C(2,5) and D(-1,3)

Equation of line CD will be

  \frac{y-5}{x-2}=\frac{3-5}{-1-2}\\\\-3 \times (y-5)=-2\times (x-2)\\\\-3 y +15=-2 x +4\\\\2 x -3 y +11=0

Equation of line AB will be, which is parallel to CD, as opposite sides of parallelogram are parallel and equal,is equal to

    2 x -3 y + k=0

Because when lines are parallel their slopes are equal.

→→Equation of line AD is , y= - 3 x.

Coordinates of point A can be calculated by

→2 x -3 × (-3 x ) +k=0

→2 x +9 x +k=0

\rightarrow x=\frac{-k}{11}\\\\\rightarrow y=\frac{3k}{11}

→→→Similarly, Coordinate of point D can be calculated by solving these two lines:

   y = -3 x + 11

  2 x -3 y + k=0

→2 x -3 × (-3 x +11) +k=0

→2 x +9 x -33 +k=0

→11 x =33 -k

x=\frac{33-k}{11}

y=-3 \times \frac{33-k}{11}+11\\\\y=\frac{-99+3 k+121}{11}\\\\y=\frac{22+3 k}{11}

→→Coordinates of A is (\frac{-k}{11},\frac{3k}{11})

Coordinates of Point D is (\frac{33-k}{11},\frac{22+3k}{11}).

you, can get infinite number of ordered pairs, for different value of k.

For, k=0 ,

A= (0,0)

D=(3,2)

3 0
3 years ago
Which choice is equivalent to the expression below?
Alexxandr [17]
D) since
\sqrt{ - 20}  =  \sqrt{ 4 \times  - 5}  = 2 \sqrt{ - 5}  = 2 \sqrt{5 \times ( - 1)}  = 2 \ \sqrt{5} i
4 0
3 years ago
Read 2 more answers
Which of the following illustrates the truth value of the given conditional statement?
kaheart [24]

Answer:

OTT →T.................

................... ............

5 0
3 years ago
Please help, thanks :)
valkas [14]
<h3>Answer:  2/21</h3>

=========================================================

Explanation:

"Without replacement" means the card selected is not put back, and we do not put a copy of that card into the deck.

We have 5 yellow cards out of 5+9+1 = 15 cards total. The probability of picking yellow is 5/15 = 1/3. Let A = 1/3.

After picking that yellow card, we have 5-1 = 4 yellow left out of 15-1 = 14 total. The probability of picking another yellow card, after the first one is not replaced, is 4/14 which reduces to 2/7. Let B = 2/7.

Multiply the values of A and B

A*B = (1/3)*(2/7) = (1*2)/(3*7) = 2/21

The probability of picking two yellow cards, without replacement, is 2/21

3 0
3 years ago
3. How would you write the edge length of Alistair's box using a<br> cube root?
Alexeev081 [22]

Answer:

cube root is what number can go into it 3 times

Step-by-step explanation:

for example, the cube root of 27 is 3, because you can times 3x3x3 and get 27. Another example is the cube root of 125 is 5, because you can times 5x5x5 and get 125.

8 0
3 years ago
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