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Svetllana [295]
3 years ago
6

Please help :) Please and thank you :D

Mathematics
1 answer:
Olin [163]3 years ago
4 0

Answer I think the first one

Step-by-step explanation:Hope this helps

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I need help with #8. I need to use the quadratic formula. I have a calculator that is programmed for the quadratic formula so al
GuDViN [60]

Answer:

  x = 14

Step-by-step explanation:

Extend line AB so that it intersects ray CE at point G. Then angles BGC and BAD are "alternate interior angles", hence congruent.

The angle at B is exterior to triangle BCG, and is equal to the sum of the interior angles at C and G:

  138 = (376 -23x) +(x^2 -8x)

Subtracting 138 and collecting terms we have ...

  x^2 -31x +238 = 0

For your calculator, a=1, b=-31, c=238.

__

<em>Additional comment</em>

You will find that the solutions to this are x = {14, 17}. You will also find that angle BCE will have corresponding values of 54° and -15°. That is, the solution x=17 is "extraneous." It is a solution to the equation, but not to the problem.

For x=14, the marked angles are A = 84°, C = 54°.

8 0
3 years ago
Find the commission.<br> Earning Commission | sales = ​$530 | commision rate = 3​% | ​commision = ?
sergij07 [2.7K]

Answer:

$15. 90

Step-by-step explanation:

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4 0
2 years ago
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Hope this helps you, and good luck in the future :)

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'The length of a rectangle is 6 feet more than three
olga_2 [115]

Answer:

length : 15 ft

width : 3 ft

Step-by-step explanation:

perimeter = 2×l(ength) + 2×w(idth) = 36

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=> 2×(3w+6) + 2w = 36

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8w = 24

w = 3

=> l = 3w + 6 = 3×3 + 6 = 9+6=15

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