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iren [92.7K]
2 years ago
14

Hi help me with this pls ​

Mathematics
1 answer:
Rudiy272 years ago
3 0

\huge \underline{ \pink{Answer}}

Refer to the attachments

Attachment (1)

B (1)

Attachment 2

B(2)

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Three DVDs and four CDs cost $92. Two DVDs and three CDs cost
Vedmedyk [2.9K]

Answer:

DVD: $16

CD: $11

Step-by-step explanation:

These two linear equations can represent the system of equations where x equals the cost of a DVD and y equals the cost of a CD:

3x+4y=92

2x+3y=65

When graphed, the solution is at (16,11).

Therefore, one DVD costs $16 and one CD costs $11.

8 0
2 years ago
Help needed asap !!!!!!
Zinaida [17]

Answer:

b)0, yes

Step-by-step explanation:

Given:

Vectors (4,8) . (6,-3)

Finding inner product of vectors:

= 4x6 + 8x-3

=24-24

=0

Now to check the angle between them using formula a.b=|a|.|b|cosθ

|a|= \sqrt{4^{2} +8^{2} } \\\sqrt{16+64}

   =8.9

|b|=\sqrt{6^{2} +(-3)^{2} } \\\sqrt{36+9}

   =6.7

Putting values of a.b=0 and |a|=8.9, |b|=6.7 in a.b=|a|.|b|cosθ we get,

0= 8.9(6.7)cosθ

cosθ =0

θ=90 degrees

Hence the two vectors are perpendicular !

7 0
3 years ago
I Think it’s A ...It’s my Final..Am I Right is it A?
vladimir1956 [14]

Answer:

yes, your right

Step-by-step explanation:

6 0
2 years ago
Hey guys I have more questions comming soon​
gavmur [86]

Answer:

25a-40b-10 is your answer, hope this helped :)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
How many times does 5 go into 100
Rasek [7]
<span>I believe in this item, we are asked to determine how many 5's should be added together in order to form 100. This is calculated by dividing 100 by 5. The answer by completing the operation would be equal to 20. Hence, the answer is 20. </span>
7 0
3 years ago
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