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mezya [45]
3 years ago
5

Mhanifa please help im almost done! I will mark brainliest :)

Mathematics
2 answers:
slava [35]3 years ago
8 0

Answer:

Hello! Your answer is, 1 :A)28 AND 2:D)75 and CD AND 3:B)10 1/2

Step-by-step explanation:

Hope I helped! Brainiest plz!♥ Have a nice afternoon. Hope you make a 100%! -Amelia

Sunny_sXe [5.5K]3 years ago
3 0

Answer:

#5

  • x/ 12 = 7/3
  • x = 12*7/3
  • x =  28 feet
  • Option A

#6

<u>Consider letter position in names of figures:</u>

  • A. QR and CD is the correct one

#7

  • x/ 8 = 7/12
  • x = 8*7/12
  • x = 4 2/3

<u>One angle marked and one angle congruent as vertical</u>

  • A. AA postulate; 4 2/3 is the correct option
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Answer:

\boxed {\boxed {\sf x=2}}

Step-by-step explanation:

The axis of symmetry can be calculated using the formula:

x=\frac{-b}{2a}

First we must determine a and b from the quadratic: -x^2+4x-8. This is in standard form, with the highest power first in descending order.

Standard form is also: ax^2+bx+c

If we compare this to the quadratic given, we can conclude that:

a= -1 \\b= 4 \\c= -8

Substitute the values for a and b into the formula.

x= \frac{-(4)}{2(-1)}

Multiply in the denominator.

x=\frac {-4}{-2}

Divide.

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This can also be determined from the graph. It is the x-coordinate of the vertex or the maximum/minimum. It divides the quadratic into 2 symmetrical halves.

8 0
3 years ago
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Step-by-step explanation:

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Answer:

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