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madreJ [45]
4 years ago
14

Paying 12$ to whoever can answer this question i created. MUST BE CORRECT

Mathematics
1 answer:
Furkat [3]4 years ago
5 0

Answer:

x = 10

I used the Interior Angles of a Triangle Rule --The sum of all 3 interior angles in a triangle is always 180°.

(3x + 28) + (5x - 18) + 90° = 180°

Now i can get rid of the parentheses and combine like terms.

3x + 5x + 28 - 18 + 90 = 180

8x + 10 + 90 = 180

8x + 100 = 180

Then i subtract 100 from both sides to isolate x.

8x + 100 - 100 = 180 - 100

8x = 80

Then, i divide both sides by 8 to find x.

8x ÷ 8 = 80 ÷ 8

x = 10

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12n²-4mn<br> factorise completely
Taya2010 [7]

Answer:

4n (3n - m)

Step-by-step explanation:

See what they both have, pull it to the outside, put what is left inside.

4n (3n - m)

8 0
3 years ago
Quadrilateral ABCD has vertices A(-3, 4), B(1, 3), C(3, 6), and D(1, 6). Match each set of vertices of quadrilateral EFGH with t
kykrilka [37]

Answer:

1) E(-3, -4), F(1, -3), G(3, -6), and H(1, -6)   a reflection across the x-axis

2) E(-3, -1), F(1, -2), G(3, 1), and H(1, 1)       a translation 5 units down

3) E(3, 4), F(-1, 3), G(-3, 6), and H(-1, 6)    a reflection across the y-axis

4) E(4, 4), F(8, 3), G(10, 6), and H(8, 6)    a translation 7 units right

Step-by-step explanation:

Quadrilateral ABCD has vertices A(-3, 4), B(1, 3), C(3, 6), and D(1, 6).

1) E(-3, -4), F(1, -3), G(3, -6), and H(1, -6)

   A(-3, 4), B(1, 3), C(3, 6), and D(1, 6)

In this case the vertices has the same abscissas, and the ordinates have opposite sign, then the transformation is a reflection across the x-axis.


2) E(-3, -1), F(1, -2), G(3, 1), and H(1, 1)

   A(-3, 4), B(1, 3), C(3, 6), and D(1, 6)

In this case the vertices has the same abscissas, and the ordinates of EFGH have 5 units less, then the transformation is a translation 5 units down.


3) E(3, 4), F(-1, 3), G(-3, 6), and H(-1, 6)

   A(-3, 4), B(1, 3), C(3, 6), and D(1, 6)

In this case the vertices has the same ordinates, and the abcissas have opposite sign, then the transformation is a reflection across the y-axis.


4) E(4, 4), F(8, 3), G(10, 6), and H(8, 6)

   A(-3, 4), B(1, 3), C(3, 6), and D(1, 6)

In this case the vertices has the same ordinates, and the abscissas of EFGH have 7 units more, then the transformation is a translation 7 units right.

7 0
4 years ago
Write an integer to represent this situation: A boat is sitting at sea level.
Bezzdna [24]

Answer:

0 because 0 is sea level, anything below is negative and anything above is positive.

Step-by-step explanation:


8 0
3 years ago
PLEASE HELP ILL MARK THE FIRST RIGHT ANSWER AS BRAINIEST
Bas_tet [7]

Answer:

26 rows

Step-by-step explanation:

126/5=25.2

there no such thing as a .2 of a row so you have to add one more

25+1=26 rows

7 0
4 years ago
Read 2 more answers
Pls help with explanation
Arada [10]
The first answer is x=63
the second one is x=10
6 0
3 years ago
Read 2 more answers
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