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olasank [31]
3 years ago
6

−15+3x=7 solve for X

Mathematics
2 answers:
Anastasy [175]3 years ago
8 0
3x = 7 + 15
3x = 22
x = 22/3
x = 7 1/3
MAVERICK [17]3 years ago
7 0

Answer:

Step-by-step explanation:

-15 + 3x = 7

3x = 7 + 15

3x = 22

x = 22/3 or 7 1/3 <==

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Please help!! I have tried it on my own and I am stuck
elena55 [62]

Answer:

1. 23.59 feet

2. 32.9°

Step-by-step explanation:

1. See the diagram attached.

The man is 11 feet distance from the bottom of the tree.

And the angle of elevation from the man to the top of the tree is 65°.

Now, we need to approximate the height of the tree,

Using the trigonometry, we can write  

\tan 65^{\circ} = \frac{\textrm {Height of the Tree}}{\textrm {Base Distance}} = \frac{h}{11}

⇒ h = 11 tan 65° = 23.59 feet (Approx.) (Answer)

2. See the diagram attached.

From the given right triangle the hypotenuse is 25 feet and the base is 21 feet.

And the angle between the hypotenuse and the base is the pitch of the ram of a NASCAR turn.

Using trigonometry, we can write  

\cos \theta = \frac{\textrm {Base}}{\textrm {Hypotenuse}} = \frac{21}{25}

⇒ \theta = \cos^{-1}(\frac{21}{25}) = 32.9^{\circ} (Answer)

8 0
3 years ago
Please answer this in two minutes
tangare [24]

Answer:

<h2>H = 60° </h2>

Step-by-step explanation:

To find angle H we use tan

tan ∅ = opposite / adjacent

From the question

The opposite is 2√21

The adjacent is 2√7

So that's

tan H = 2√21/ 2√7

H= tan-¹ 2√21/ 2√7

<h3>H = 60° </h3>

Hope this helps you

8 0
4 years ago
At the Charleston Balloon Festival, a hot air balloon is sighted at an altitude of 800 feet. It appears to be descending at a st
Lana71 [14]

Answer:

D 800-20m

Step-by-step explanation:

If I am wrong then it could  be B. I hope I could help.

7 0
3 years ago
Read 2 more answers
I believe that it’s c, but I’m <br> not certain… Can someone help me out?
Neporo4naja [7]

Answer:

Yes, the answer is C {3,5,7}

Domain of a function is the input value and range is the result or output value that we get.

6 0
3 years ago
Read 2 more answers
Is the binomial a factor of the polynomial function?
olchik [2.2K]

Answer:

YES

NO

NO

Step-by-step explanation:

The given polynomial is: $ f(x) =  x^3 + 4x^2 - 25x - 100 $

(x - a) is a factor of a polynomial iff x = a is a solution to the polynomial.

To check if (x - 5) is a factor of the polynomial f(x), we substitute x = 5 and check if it satisfies the equation.

∴ f(5) = 5³ + 4(5)² - 25(5) - 100

        = 125 + 100 - 125 - 100

        = 225 - 225

        = 0

We see, x = 5 satisfies f(x). So, (x - 5) is a factor to the polynomial.

Now, to check (x + 2) is a factor.

i.e., to check x = - 2 satisfies f(x) or not.

f(-2) = (-2)³ + 4(-2)² - 25(-2) - 100

      = -8 + 16 + 50 - 100

     = -108 + 66

     ≠ 0

Therefore, (x  + 2) is not a factor of f(x).

To check (x - 4) is a factor.

∴ f(4) = 4³ + 4(4)² - 25(4) - 100

        = 64 + 64 - 100 - 100

        = 128 - 200

        ≠ 0

Therefore, (x - 4) is not a factor of f(x).

7 0
3 years ago
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