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Darina [25.2K]
2 years ago
5

PLEASE HELLLLLLLLLLLLLLP!

Mathematics
2 answers:
Vlad [161]2 years ago
5 0

Answer:

What do you need ?.....

Vinvika [58]2 years ago
5 0
You should add photograph or smth for answers :/
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Find m∠DEC (the picture is not drawn to scale).
pochemuha

Answer:

M∠DEC equals 123º.

Step-by-step explanation:

The sum of a triangle's three angles always equal 180º. The exterior angle, x, equals the two non-adjacent interior angles.

180 - {(x - 45)+(x - 12)} = m∠DEC

m∠DEC + x = 180

<u>(x - 45) + (x - 12) = x</u>

Solving for x:

(x - 45) + (x - 12) = x

x - 45 + x - 12 = x                             Remove parenthesis

2x - 57 = x                                       Combine like terms

2x = x + 57                                      Add 57 to both sides

<u>x = 57</u><u>                                             Subtract x from both sides</u>

Finding m∠D:

x - 45 = ?

<u>57 - 45 = </u><u>12º                                          </u>

Finding m∠C:

x - 12 = ?

<u>57 - 12 = </u><u>45º                                           </u>

<em>** </em><em>(Checking x: 12 + 45 = 57) </em><em>**</em>

<em>Finding </em>m∠DEC:

AC is a straight line, and because straight lines are equivalent to 180º, we subtract 57 from 180:

180 - 57 = 123º

Hope this helps,

❤<em>A.W.E.</em><u><em>S.W.A.N.</em></u>❤

8 0
3 years ago
Which sum will be neither positive nor negative?<br> 07+(-6)<br> 0 3+2<br> 0-6 + 6<br> 0-4-(-4)
makkiz [27]

Step-by-step explanation:

The awnser is -6+6 because it would end up being 0, which is not positive nor negative

4 0
3 years ago
If the original function () = 22 − 1 is shifted to the left 3 units to make the
Rom4ik [11]

A horizontal translation is expressed by transforming

f(x)\mapsto f(x+k)

If k is positive, the function is translated to the left. If k is negative, the function is translated to the right.

So, a 3-units left shift is given by k=3. So you have

f(x)=2x^2-1 \implies f(x+3)=2(x+3)^2-1

4 0
3 years ago
The triangles shown below must be congruent.<br> O True<br> O False
sertanlavr [38]

Answer:

The answer to the problem is True

7 0
2 years ago
Which of the following measurements could be the side lengths of a right triangle?
nataly862011 [7]

For this case we have that every rectangle traingule complies with the Pythagorean theorem:

c = \sqrt {a ^ 2 + b ^ 2}

Where:

c: It is the hypotenuse

b: It's the base

a: It's the height

It is noted that if we replace:

a = 66\\b = 88\\c = \sqrt {66 ^ 2 + 88 ^ 2}\\c = 110

So, we have c = 110 \ in ^ 2

If we evaluate the other options we will obtain wrong results.

Thus, a rectangle triangle can have measurements of:

66 in, 88 in and 110 in respectively

Answer:

Option b

8 0
3 years ago
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