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Ira Lisetskai [31]
2 years ago
11

I forgot to do homework and its due tomorrow Solve: -2 3/4 ÷ (-2.5)

Mathematics
1 answer:
Gemiola [76]2 years ago
6 0

Answer:

It is 1.1

Step-by-step explanation:

-hope this helps.

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Write a coordinate proof. Prove quadrilateral WXYZ, having vertices W(-5, 6), X(-1, 10), Y(1, 4), and Z(-2, -3) is a trapezoid.
Igoryamba

Answer:

The diagonals are bisectors of each other and meet at  (1, -5/2) but are not congruent, so WXYZ is a parallelogram and not a rectangle

Step-by-step explanation:

for parallelograms.

the diagonals intersect at the midpoints

W                             X

Z                             Y

Diagonals are  WY  and  XZ

WY :   (-4, -3) to  (6, -2)

midpoint is   [(-4 + 6)/2  ,  (-3 - 2)/2 ] = ( 1, -5/2 )

XZ :   (0, -1)  to  (2, -4)

midpoint is  [ (0 + 2)/2 ,  (-1 + -4)/2 ]  = (1, -5/2)

The diagonals are bisectors of eachother.

Next show that these diagonals are not congruent.

length of  WY  =  root (  (-4 - 6)^2  +  (-3 - (-2))^2 )

WY = root ( 100  +  1)

WY = root(101)

length of XZ  =  root (  (0 - 2)^2  +  ( -1 - -4)^2 )

XZ =  root (4  +  9) = root (13)

we see that  WY  is not equal to XZ

...

so  ..  quadrilateral WXYZ is a parallelogram but not a rectangle.

6 0
4 years ago
Solve the following quadratic by
Ainat [17]

Answer:

{x  = -1 + √13  ,  x  = -1 - √13}

Step-by-step explanation:

<u><em>Completing the square</em></u>:

f(x) = x² + 2x - 12

     = x² + 2x + 1 - 1 - 12

     = (x² + 2x + 1) - 1 - 12

     = (x + 1)² - 13

<u><em>Solving</em></u>:

f(x) = 0

⇔ (x + 1)² - 13 = 0

⇔ (x + 1)² = 13

⇔ x + 1 = √13  or  x + 1 = -√13

⇔ x  = -1 + √13  or  x  = -1 - √13

4 0
2 years ago
Please answer both of the question in the photo plsss
astra-53 [7]

Answer:

-12

-18

Step-by-step explanation:

-n+8=20

-n=20-8

n=12

-36=n-18

-n=-18+36

n=-18

6 0
3 years ago
Natalie put 1/3 cup of flour in a bowl. Her sister put another 3/4 cup of flour in the bowl. They need a total of 4 cups of flou
maria [59]

Answer:

2 11/12

Step-by-step explanation:

I know this because you first add 1/3 + 3/4, and that equals 1 1/12. Then, I did 4 - 1/12 and got the answer 2 11/12.

7 0
3 years ago
The speed of light is 299,792,458 meters per second. About how far can a light beam travel in 3 seconds? Write your answer as a
ArbitrLikvidat [17]

Answer:

9 x 10 to the power of 8 meters in 3 seconds

Step-by-step explanation:

4 0
3 years ago
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