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Greeley [361]
3 years ago
13

I need help with this problem.

Mathematics
1 answer:
jek_recluse [69]3 years ago
5 0
Hello, the question is find the angle of degrees in mDC and m angle ADB right??. the work for my awnser was DC= 45 and <ADB was 98 and 1/2. I hoped this helped if its wrong then tell me I'll try again thxs :). Plz mark me brainiest!!!! and there are more than 1 way to show work if u want!
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The second step in the process for factoring the trinomial x2-5x-36 is to
Ivanshal [37]
X²-5x-36

Write -5x as a sum or difference.

x²+4x-9x-36

Factor out x from the expression.

x(x+4)-9(x+4)

Factor out x+4 from the expression.

(x+4)(x-9)

Answer: The second step is to factor out x.
8 0
4 years ago
Read 2 more answers
Santiago wants to walk at least 500 miles before the end of this year. He has already walked 437 miles, and there are 36 days le
Mrrafil [7]

Answer:

437+36x>=500

Step-by-step explanation:

This basically shows that 437 plus the x miles he will walk per day for 36 will total to more than or equal to 500

7 0
3 years ago
Read 2 more answers
Suppose that f : [a, b] → [a, b] is continuous. Prove that f has a fixed point. That is, prove that there exists c ∈ [a, b] such
nikklg [1K]

Answer:

Step-by-step explanation:

define the function:

g(x) = f(x) -x

As both f(x) and x are continuous functions, g(x) will also be continuous.

Now, what can we say about g(a) = f(a) -a?

we know that a\leq f(a) \leq b, thus:

a-a\leq f(a)-a \leq b-a\\0 \leq g(a) \leq b-a

thus  g(a) is non-negative.

What about g(b) ? Again we have:

a\leq f(b) \leq b\\a-b \leq f(b) -b \leq  0\\a-b \leq g(b) \leq  0

That means that g(b) is not positive.

Now, we can imagine two cases, either one of g(a) or g(b) is equal to zero, or none of them is. If either of them is equal to zero, we have found a fixed point! In fact, any point c for which g(c)=0 is a fixed point, because:

g(c) = 0 \implies f(c) -c = 0 \implies f(c) = c

Now, if g(a) \neq  0 and g(b) \neq 0, then we have that

g(a) >0 and g(b) < 0. And by Bolzano's theorem we can assert that there must exist a point c between a and b for which g(c)=0. And as we have shown before that point would be a fixed point. This completes the proof.

6 0
3 years ago
Please help with geometry homework will make brainliest
o-na [289]

<u>Answer</u>

3


<u>Explanation</u>

The two lines in the diagram are secants meeting outside the circle.  

The products of a secant and the extension of the chord of one line is equal to the products of a secant and the extension of the chord of the other line.

∴ 4 × 9 = x × 12

 36 = 12x

x = 36/12

  = 3

4 0
3 years ago
The cost, C, in United States Dollars ($), of cleaning up x percent of an oil spill along the Gulf Coast of the United States in
kherson [118]

Complete Question

On the uploaded image is a similar question that will explain the given question

Answer:

The value of k is  k  =  214285.7

The percentage  of the oil that will be cleaned is x = 80.77\%

Step-by-step explanation:

From the question we are told that

   The  cost of cleaning up the spillage is  C =  \frac{ k  x  }{100 -  x }  x \le x  \le  100

     The  cost of cleaning x =  70% of the oil is  C =  \$500,000

   

Now at  C =  \$500,000 we have  

       \$  500000 =  \frac{ k   * 70   }{100 -  70 }

       \$  500000 =  \frac{ k   * 70   }{30 }

      \$  500000 =  \frac{ k   * 70   }{30 }

      k  =  214285.7

Now  When  C =  \$900,000

       x = 80.77\%

       

 

5 0
3 years ago
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