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Helga [31]
2 years ago
6

This is hard please help it makes no sense

Mathematics
2 answers:
posledela2 years ago
8 0

We will find the length of DE using trigonometric ratios. And the trigonometric ratio we will use here is

\sf \tan( \theta)  =  \frac{opposite}{adjacent}

  • Opposite = 17 m
  • Adjacent = DE
  • θ = 51°

\tt \tan(51°)  =  \frac{17}{x}

\tt \tan(51°)  \times x = 17

\tt \: x =  \frac{17}{ \tan(51°) }

\tt \: x≈13.766

\boxed{ \sf \: x≈13.8 \: (when \: rounded \: off)}

<em>Thus, Option C is the correct choice!!~</em>

tigry1 [53]2 years ago
3 0

Answer:

lk12

Step-by-step explanation:

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17. Julie has $80 in her savings account and plans to save Sr each
marshall27 [118]

Answer:

$8(x + 10)

Step-by-step explanation:

The expression $8x + $80  has two terms. They are $8x and $80.

When you factor an expression, you are looking for numbers that every term in the expression can divide by (and give a whole number).

Just by looking at the terms, you see they both have $ you can factor out. They can both also be divided by 8. This is called taking out a common factor.

$8x + $80     Take out the common factor

= ($8x) / $8 + ($80) / $8

= $8(x + 10)      The common factor goes outside the terms' bracket

This expression can't be factored more because there are no common factors. The binomial also doesn't have square numbers for example, which might make a case where you need to factor further with different methods.

7 0
3 years ago
5(x – 10) = 30 – 15x<br> Solve
Doss [256]

Answer:

x=4

Step-by-step explanation:

5(x-10) = 30- 15x

5x - 50= 30 - 15x

+15x              +15x

20x - 50 = 30

       +50    +50

20x = 80

/20     /20

x = 4

Hope this helps!

7 0
3 years ago
HELPPPPPP ASAP What is the length of the third side of the window frame below? (5 points) (Figure is not drawn to scale.) 58a 1)
ollegr [7]

Answer:

The answer is 3) 40.

Step-by-step explanation:

since you're working with the Pythagorean theorem, you should know that a^2+b^2=c^2, therefore, we know that we only have two sides. we have a and c. we know that a = 42 and c = 58, giving us the equation of 42^2+b^2=58^2,

we want to find b!

so we would simply subtract the two.

58^2 - 42^2 = b

b = 1600

now we want to square root,

b = sqrt1600

which in the end, gives us the answer of 40.

4 0
2 years ago
One number is 8 more than another number, and their sum is 16. What are the 2 numbers?
gayaneshka [121]

Answer:

x = 12

y = 4

Step-by-step explanation:

x + y = 16

x - y = 8

y + 8 = x

Replace x with y + 8 in the new equation

8 + 2y = 16 ----> we can minus 8 on both sides

2y = 8 -----> divide both sides by 2

y = 4

Now for the x value

x + 4 = 16 ----> minus 4 on both sides

x = 12

5 0
3 years ago
Read 2 more answers
Which of the following expresses the possible number of positive real solutions for the polynomial equation shown below?
jarptica [38.1K]
In order to figure this out you need to use Descartes Rule. I attached a picture showing Descartes Rule.  If the signs changes for when x is positive then the number of times it changes are the possible positive solution. If the sign changes when x is negative then the number of times it changes are the possible negative solutions. With that said the answer is A. View the picture I have attached for the possible + - and imaginary solutions.

Answer = A) One possible positive solution.


4 0
3 years ago
Read 2 more answers
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