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jolli1 [7]
3 years ago
9

Can someone plz help me with this I’m not understanding this (The answer is not b)

Mathematics
1 answer:
Dafna11 [192]3 years ago
3 0

Answer:

D.  m = 20 , n = 10.

Step-by-step explanation:

The sine of 60 is √3/2, so

sin 60 =  10√3 / m = √3/2

√3 m = 20 √3

Divide both sides by √3:

m = 20.

cos 60 = 1/2 =  n / 20

2n = 20

so n = 10.

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So you subtract $22.89 from $54.73 to get a total of $31.84 and that’s how much the customer paid.
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Consider the quadratic equation x2 − 6x = 16.
e-lub [12.9K]

Answer:

  1. C) (x − 3)2 = 25
  2. C) Factor out 4 from 4x2 + 40x.

Step-by-step explanation:

1. Adding the square of half the x-coefficient to both sides of the equation will "complete the square." That square is 9, so the result on the right is 16+9 = 25. Only selection C matches.

___

2. To complete the square, you want to be able to put the quadratic into the form a(x -h)^2 = -k. For the purpose, it is most convenient to first factor "a" from the given quadratic. Then you can determine "-h" to be half the x-coefficient inside the parentheses.

Here, that looks like ...

  4(x² +10x) = 80 . . . . . . . . . . step 1: factor out 4

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8 0
3 years ago
Number four please help. Whatever helps gets a Brainly award
pashok25 [27]
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She can buy 2 pairs of shoes.

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~Kiwi
8 0
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