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boyakko [2]
3 years ago
12

Number 14 Help Please

Mathematics
1 answer:
omeli [17]3 years ago
8 0

Answer:

there is no right answer tell ur teacher

Step-by-step explanation:

there is no right answer i dont know why

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Let f(x) = -3x2 + 6x. Find f(2)
NemiM [27]

Answer:

0

Step-by-step explanation:

f(x) = -3x^2 + 6x

Let x=2

f(2) = -3*(2)^2 + 6(2)

       =-3(4) +12

      = -12+12

     =0

3 0
3 years ago
The string of a kite is 100 meters long and it makes an angle of 60° with the ground. What is the height of the kite?
Naddika [18.5K]

Answer:

  50√3 ≈ 86.6 m

Step-by-step explanation:

The geometry can be modeled by a right triangle with the height of the kite being the leg opposite the 60° angle. The hypotenuse has the given length of 100 m.

The mnemonic SOH CAH TOA reminds you that the relation between angles and the sides of interest here is ...

  Sin = Opposite/Hypotenuse

  sin(60°) = (kite height)/(100 m)

  kite height = (100 m)·sin(60°) = (100 m)(√3)/2

  kite height = 50√3 m ≈ 86.6 m

7 0
3 years ago
I need help finding bc and ac
Vikki [24]
<h3>Given :</h3>

  • AB = 7
  • ∠A = 45°

<h3>To Find :</h3>

  • BC = ?
  • AC = ?

<h3>Solution :</h3>

From point A,

\bf tan A = \dfrac{perpendicular}{base}

\bf \implies tan A = \dfrac{BC}{AB}

\bf \implies tan A = \dfrac{BC}{7}

Now, we are given ∠A = 45°

\bf \implies tan A = tan 45^{\circ}

\bf \implies tan 45^{\circ} = \dfrac{BC}{7}

Now, we know that tan45° = 1

\bf \implies 1 = \dfrac{BC}{7}

\bf \implies 1 \times 7 = BC

\bf \implies BC = 7

Now, by Pythagoras' theorem,

AC² = BC² + AB²

\bf \implies AC^{2} = (7)^{2} + (7)^{2}

\bf \implies AC^{2} = 49 + 49

\bf \implies AC^{2} = 98

\bf \implies AC = \sqrt{98}

\bf \implies AC = 7 \sqrt{2}

\pink{\bf \therefore \: values \: of \: AC = 7 \sqrt{2} \: and \: BC = 7}

8 0
3 years ago
The perimeter of a rectangle is 12 inches. If the rectangle has a width that is 2 inches less than its length, what is its area
butalik [34]

Answer:

The area is 8

Step-by-step explanation:

If the perimeter is 12, we can just start guessing and checking. in this case, if 4 is the length, that means 2 is its width, since 4-2=2. then you find the area(basexhight) 4x2=8!

3 0
3 years ago
What is a simplified expression for (+)−(+)?
mariarad [96]

Answer:  -  Just a minus sign

Subtracting a positive is subtraction.

<h3>The - changes the second (+)  to a negativ </h3>

Step-by-step explanation:

Perhaps tthe point of this question would br to contrast it with

(+)-(-)  becomes +

<h3>That would be Subtracting a negative changes to addition.</h3>
4 0
3 years ago
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