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mart [117]
3 years ago
9

How to solve this problem im not getting a good answer

Mathematics
2 answers:
Margaret [11]3 years ago
8 0
     1) rewrite x^2-9 in the form a^2-b^2, where a=x and b=3.
4 over x+3 + 3 over x^2-3^2
 
     2)Use difference of squares
4 over x+3 + 3 over (x+3)(x-3)
 
     3) Cross multiply
4(x-3)+3 over (x+3)(x-3)
 
     4) Expand
4x-12+3 over (x+3)(x-3)
 
     5) <span>Simplify </span><span>4x-12+3<span>4x−12+3</span></span><span> to </span><span>4x-9<span>4x−<span>9
</span></span></span>4x-9 over (x+3)(x-3)



kow [346]3 years ago
7 0
Well, you have to simplify the bottom part to be able to answer it as a whole number. Hope this helps. 
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10 points
oee [108]

Answer:

x = 240 feet

Step-by-step explanation:

It is given that,

The angle of depression is 30 degrees from the bottom of the boat to a  deep sea diver at the depth of 120 ft.

We need to find the distance x the diver must  swim up to the boat. It can be calculate by applying trigonometry as follows :

\sin30=\dfrac{120}{x}\\\\x=\dfrac{120}{\sin30}\\\\x=240\ \text{feet}

So, the distance the diver must swim up to the boat is 240 feet.

6 0
3 years ago
Which expression is equivalent to 4.4.4.4.4.4.4.4?
seraphim [82]

Answer:

your answer is D

Step-by-step explanation:

hope this helps

8 0
3 years ago
Read 2 more answers
(2x³+4x²-x+8) / (x² + 3x + 2)
a_sh-v [17]

\dfrac{2x^3+4x^2 -x+8}{x^2 +3x+2}\\\\\\=\dfrac{2x^3+6x^2+4x-2x^2-6x-4+x+12}{}\\\\=\dfrac{2x(x^2 +3x+2)-2(x^2 +3x+2)+x+12}{x^2 +3x+2}\\\\\\=\dfrac{2x(x^2+3x+2)}{x^2 +3x +2 }- \dfrac{2(x^2 +3x +2)}{x^2 +3x +2 } + \dfrac{x+12}{x^2 +3x+2}\\\\\\=2x-2 + \dfrac{x+2}{x^2 +3x +2}\\\\\\=2x-2 + \dfrac{x+12}{x^2 +2x +x +2}\\\\\\=2x-2 + \dfrac{x+12}{x(x+2) + x+2}\\\\\\=2x-2 + \dfrac{x+12}{(x+1)(x+2)}\\

3 0
2 years ago
Need help with graph
andre [41]

Because the domain refers to the set of possible input values, the domain of a graph consists of all the input values shown on the x-axis. The range is the set of possible output values, which are shown on the y-axis.

The domain is the values of x between 1 and 7

The range

4 0
1 year ago
Which property is shown below?
Tpy6a [65]

Answer:

C

Step-by-step explanation:

The identity property for addition tells us that zero added to any number is the number itself.

5 0
3 years ago
Read 2 more answers
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