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Mumz [18]
4 years ago
13

Help me plz i need help.

Mathematics
1 answer:
AysviL [449]4 years ago
8 0

answer for this question is ( d)x=12

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A store sells televisions for $360 and DVD burners for $270. The entire stock is worth $52,920 and there are a total of 164 tele
bogdanovich [222]

Answer:  96 Televisions, 68 DVD burners

<u>Step-by-step explanation:</u>

Let T represent the quantity of televisions

Let D represent the quantity of DVD burners

<u>Given:</u>

value of television (T) = 360

value of DVD burners (D) = 270

Total value = 52,920

<u>Equations:</u>

Value: 360T + 270D = 52,920

Quantity:   T + D = 164

We can solve the system of equations using the Elimination Method:

-1(360T + 270D = 52,920) →  -360T - 270D = -52,920

  360(T + D = 164) →                <u>360T + 360D</u> = <u>59,040 </u>

                                                                90D = 6,120

                                                              <u> ÷90   </u>  <u> ÷90    </u>

                                                                     D = 68

Input the value of D into one of the equations to solve for T

T + D = 164

T + 68 = 164

      T   = 96

6 0
3 years ago
State one form of the Law of Cosines and provide a trick for writing the other two forms and explain when Law of Cosines should
Yuki888 [10]

Solving for <em>Angles</em>

\displaystyle \frac{a^2 + b^2 - c^2}{2ab} = cos∠C \\ \frac{a^2 - b^2 + c^2}{2ac} = cos∠B \\ \frac{-a^2 + b^2 + c^2}{2bc} = cos∠A

* Do not forget to use the <em>inverse</em> function towards the end, or elce you will throw your answer off!

Solving for <em>Edges</em>

\displaystyle b^2 + a^2 - 2ba\:cos∠C = c^2 \\ c^2 + a^2 - 2ca\:cos∠B = b^2 \\ c^2 + b^2 - 2cb\:cos∠A = a^2

You would use this law under <em>two</em> conditions:

  • One angle and two edges defined, while trying to solve for the <em>third edge</em>
  • ALL three edges defined

* Just make sure to use the <em>inverse</em> function towards the end, or elce you will throw your answer off!

_____________________________________________

Now, JUST IN CASE, you would use the Law of Sines under <em>three</em> conditions:

  • Two angles and one edge defined, while trying to solve for the <em>second edge</em>
  • One angle and two edges defined, while trying to solve for the <em>second angle</em>
  • ALL three angles defined [<em>of which does not occur very often, but it all refers back to the first bullet</em>]

* I HIGHLY suggest you keep note of all of this significant information. You will need it going into the future.

I am delighted to assist you at any time.

7 0
3 years ago
Pls help me with these math problems
Genrish500 [490]
A) 24; finding the area of a parallelogram is the same as finding the area of a rectangle
5 0
3 years ago
Read 2 more answers
Today, everything at a store is on sale. The store offers a 20% discount.
joja [24]
T shirt would be $3.60
The hat is $90
5 0
3 years ago
Read 2 more answers
Which of the following is x=-5 a solution ?
Katarina [22]

Answer:

C and D

Step-by-step explanation:

Plug X in and see which equations/expressions are true

8 0
3 years ago
Read 2 more answers
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