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SOVA2 [1]
3 years ago
11

Please help, if able! 10 points up^^

Mathematics
1 answer:
Debora [2.8K]3 years ago
7 0

cosine=\dfrac{adjacent}{hypotenuse}\\\\sine=\dfrac{opposit}{hypotenuse}\\\\\boxed{\cos57^o=\dfrac{x}{51}}

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3 0
2 years ago
The sum of three numbers is 26. Twice the first minus the second is the third less 2. The third is the second minus 3 times the
Agata [3.3K]

Let a, b, c represent the three numbers. The problem statement gives rise to three equations:

  • a +b +c = 26
  • 2a -b = c -2
  • -3a +b = c

Adding the first two equations gives

... (a +b +c) +(2a -b) = (26) +(c -2)

... 3a +c = 24 +c . . . . . simplify

... 3a = 24 . . . . . . . . . . subtract c

... a = 8 . . . . . . . . . . . . divide by 3

Adding the second and third equations gives ...

... (2a -b) +(-3a +b) = (c -2) +(c)

... -a = 2c -2 . . . . simplify

... -6 = 2c . . . . . . add 2, substitute for a

... -3 = c . . . . . . . . divide by 2

Using the third equation we can find b.

... -3·8 +b = -3 . . . . substitute for a and c

... b = 21 . . . . . . . . .add 24

The numbers are 8, 21, -3.

_____

The method above is sort of "ad hoc", taking advantage of the numbers in this particular set of equations. You can use more formal methods of Gaussian elimination or Cramer's Rule to solve these by just following a procedure. Or, your graphing calculator can do it for you.

6 0
3 years ago
How to find the distance? I need help with part B
just olya [345]

Answer:

99.96

Step-by-step explanation:

Your height is correct.

Part B is asking for the length of the hypotenuse.

76.6^2 + 64.25^2 = x^2

x^2 = 9995.6225

x = 99.96 or 99.98 depending on if you round to 76.6 or not

8 0
3 years ago
Read 2 more answers
9. y=-2(x-3)
Artyom0805 [142]
The answers is 11 because it has y=mx+b
8 0
3 years ago
Read 2 more answers
PLEASE HELP!!!!!!!!!
notka56 [123]

Answer:

thyx

Step-by-step explanation:

sakfjy

7 0
3 years ago
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