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hjlf
4 years ago
12

Pls help me i have tried to answer this so many times and i’m never right

Mathematics
2 answers:
Andreas93 [3]4 years ago
8 0
The answer is 75°.

Ok, now I am going to walk you through step-by-step so hopefully this will make more sense :)

We know that ADC=134°, so if we were to add the two angles that make it up together, their sum should equal 134°.

So if we wanted to write that out it would look like this:
(5x+4)+(7x-2)=134°.

Now we can add like terms, so add the x's together and add the regular numbers together. This means we do 5x+7x=12x and 4-2=2. The simplified equation should now look like this:
12x+2=134°.

We can now subtract 2 from both sides, then to get x alone, we divide 132 by 12. To write it out it looks like this:
12x=132°, then x=11.

Now that we know x, we can plug it into the value of BDC, so:
7(11)-2. 7×11=77 and 77-2= 75°

Hope this helps!
valina [46]4 years ago
3 0

ANGLES ADB AND BDC ADD UP TO EACH OTHER. SOLVE FOR X.

134 = (5x + 4) + (7x - 2)

134 = 12x + 2

132 = 12x

 11 = x

SUBSTITUTE INTO ANGLE'S EQUATION

  7x - 2

= 7(11) - 2

= 77 - 2

= 75

Therefore, <BDC is 75 degrees.

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Express in seconds.<br><br> 30"<br> 45"<br> 50"
Rus_ich [418]

Answer:

45"

Step-by-step explanation:

(3/4 x 60 )"

=45"

8 0
3 years ago
Math help please? Please explain because I'm really confused
Tasya [4]
The answer is the letter b cos u = 1 /sec u

When you use it in the left side of the identity that you want to verify, sec y cos y = 1 , you get this:

sec y cos y            =  1

[sec y ] [ 1 / sec y ] =  1

[sec y] / [sec y]       =  1

         1                    = 1 which proves the idenity.


5 0
4 years ago
G+5&gt;12 solution please i don’t know how to do this
Musya8 [376]

Answer:  g > 7

Graph has an open circle at 7 on the number line, shading to the right

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

Explanation:

Think of it like saying "I have a number, and I add on 5. The result is something larger than 12". You can guess and check your way to the answer, but the quickest way is to subtract 5 from both sides.

We subtract to undo the addition happening to the 'g'.

g+5 > 12

g+5-5 > 12-5

g > 7

So the number is larger than 7. For instance, if g = 8, then,

g+5 > 12

8+5 > 12

13 > 12

This is a true statement.

-------------------------

If you need to graph the solution, then you'll have an open circle at 7 on the number line. The open circle says to the reader "don't include this value as part of the solution set". Shade to the right of the open circle to describe all values larger than 7.

In summary, the graph has an open circle at 7 and shading to the right.

3 0
3 years ago
Help me please this is on writing direct proportions but I don’t really understand it
Natasha_Volkova [10]

Answer:

I can do the last two

85×m=z

85×20=1700

4 0
3 years ago
Urgent. Factor the trinomial by grouping. Please show work. 14x^2y+9xy^2+y^3. If prime, show how you got prime answer.
ch4aika [34]

Answer:

y x (2x +y) x (7x +y)

Step-by-step explanation:

14x^2y + 9xy^2 +y^3

(Factor the expression)

y x (14x^2 +9xy +y^2)

(Rewrite the expression)

y x (14x^2 + 7xy +2xy +y^2)

(Factor the expression)

y x (7x x(2x +y) + y x (2x +y) )

(Factor the expression)

y x (2x +y) x (7x +y)

:))

3 0
3 years ago
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