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geniusboy [140]
3 years ago
10

Please help me asap!!

Mathematics
1 answer:
sukhopar [10]3 years ago
8 0

Answer:

triangle DCA is congruent to triangle BAC       -      because of AAS (angle-angle-side) theorem

Step-by-step explanation:

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add the term that makes the given expression into a perfect square. write the result as the square of a bracketed expression c s
Molodets [167]
<h2>Perfect Squares</h2>

Perfect square formula/rules:

  • a^2+2ab+b^2=(a+b)^2
  • a^2-2ab+b^2=(a-b)^2

Trinomials are often organized like ax^2+bx+c.

The <em>b</em> value in this case is <em>c</em>, and it will always equal the square of half of the <em>b</em> value.

  • Perfect square trinomial: ax^2+bx+(\dfrac{b}{2})^2
  • or ax^2-bx+(\dfrac{b}{2})^2

<h2>Solving the Question</h2>

We're given:

  • c^2-4c

In a trinomial, we're given the ax^2 and bx values. <em>a</em> in this case is 1 and <em>b</em> in this case is 4. To find the third value by dividing 4 by 2 and squaring the quotient:

  • 4 ÷ 2 = 2
  • 2² = 4

Therefore, the term that we can add is + 4.

c^2-4c+4

To write this as the square of a bracketed expression, we can follow the rule a^2-2ab+b^2=(a-b)^2:

(c-2)^2

<h2>Answer</h2>

c^2-4c+4

(c-2)^2

4 0
2 years ago
An elevator starts on the 100th floor. It descends 4 floors every 10 seconds. At what floor will the elevator be 60 seconds afte
Artyom0805 [142]
So is 4 floors / 10 seconds
If you have 60 seconds you can multiple 10 by 6 because 10×6=60
so you also have to multiple 4 by 6
4×6=24
and because it's descending it's 100-24= 76
8 0
3 years ago
Read 2 more answers
7 ⅓ ÷ 225 = <br> answer this question plz
antoniya [11.8K]

Answer:

0.03259..

Step-by-step explanation:

7 0
3 years ago
Please Help! One Question!
TiliK225 [7]
Here we don't know the length of the hypo, but do have measures of both legs of this right triangle:  x and 40 yd.

  Use the tangent function to determine the value of x:

  x
--------- = tan 62 degrees.  Solving for x:    x = (40 yd)(tan 62 deg).  
40 yd                                  can you evaluate this yourself?
5 0
3 years ago
Hich decimal represents the shaded portion?
svlad2 [7]
.3, 3 out of 10 are covered making .3, 30%
8 0
3 years ago
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