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andreyandreev [35.5K]
3 years ago
15

Please help, would be greatful :)

Mathematics
1 answer:
IrinaVladis [17]3 years ago
7 0

Answer:

x ≈ 31.0°

Step-by-step explanation:

Using the tangent ratio in the right triangle

tanx = \frac{opposite}{adjacent} = \frac{9}{15}, then

x = tan^{-1} (\frac{9}{15} ) ≈ 31.0° ( to 1 dec. place )

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Please help me with these questions please I have 12 questions and will reward anyone who helps me with them all this is 11/12
Inessa [10]
N=23

hope thats right

4 0
3 years ago
Which polynomial represents the sum below?
Bezzdna [24]
The correct answer is:  [D]:  " 4x² − 12x − 4 " .
___________________________________________________
Explanation: 
___________________________________________________
Given:
___________________________________________________
    "  (16x²  − 16)  +  ( -12x² − 12x + 12) " ;    Simplify.
___________________________________________________
Note the "distributive property of multiplication:
___________________________________________________
  a(b + c)  =  ab +  ac ; 

  a(b − c)  =  ab − ac .
___________________________________________________
So we can rewrite the expression as:

  "  (16x²  − 16)  +  1( -12x² − 12x + 12) "  ; 

{The "1" is implied; since "1", multiplied by any value, results in the exact same value.}.

Let us examine the following part of the expression:
_________________________________________________
    "  + 1 ( -12x² − 12x + 12 ) " ;

Using the distributive property of multiplication:
 
"  + 1 ( -12x² − 12x + 12 )  =  (1 * -12x²) − (1 * 12x) + (1 * 12) ; 

                                        =   "  − 12x² − 12x + 12 " ; 
_________________________________________________
Now, bring down the other part of the expression; & rewrite:
_________________________________________________
→   " (16x²  − 16)  − 12x² − 12x + 12 " ; 

   →  " 16x²  − 16 − 12x² − 12x + 12 "  ;

Now, combine the "like terms" :

     + 16x²  −  12x²  = 4x²  ; 

     − 16 + 12 =  -4 ; 

and we have " − 12x" ;

So we can rewrite the expression as:
_______________________________________________________

 →   " 4x² − 12x − 4 " ; 

        →  which is:  "Answer choice:  [D]:  " 4x² − 12x − 4 <span>" .
</span>_______________________________________________________
 
5 0
3 years ago
The ratio of boys to girls in a group is 5:1. If there are 60 more boys than girls, work out how many people there are in total
REY [17]

Answer:

Step-by-step explanation:

5+1=6

5-1=4

4/6 = 60

6/6 = ?

6/6 x 60 x 6/4

= 75 people

4 0
3 years ago
What is the angle that forms from the two vectors below? *<br> v= &lt;-12,5&gt;, w= &lt;3,-10&gt;
Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

3 0
2 years ago
company 1 charges 12 dollars per foot of fence find the cost oif they did the job. the perimeter is 618.79
S_A_V [24]

$12 per foot, 618.79 feet total.

Multiply 618.79 by $12 to get the answer: $7,425.48

4 0
3 years ago
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