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2 years ago

ANYONE PLEASE HELP!!!

Mathematics

2 answers:

Nana76 [90]2 years ago

5 0

457 irk sorry I don’t do this

Alona [7]2 years ago

4 0

Closed circle on -18 shaded to the left because it’s less than or equal to -18 (i think u meant to put -18 not -108)

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The length of a rectangle is 3 inches more than its width. If the perimeter is 42 inches, find the dimensions of the rectangle.

mojhsa [17]

The problem uses the perimeter formula. P = 2w + 2l where w is the width, and l is the length.

We know the length (l) is 3 inches longer than it's width (or l = w+3). Substitute w +3 into Perimeter equation

P = 2w + 2(w+3). That simplifies to P = 4w + 6.

Since P + 42, we have 42 = 4w +6. With some simple algebra we find that w = 9 and l = 12.

Hope this helps!

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2 years ago

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nika2105 [10]

Answer:

f(-x)=-x-3

f(x^-1)=(1/x) -3

Step-by-step explanation:

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3 years ago

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saul85 [17]

Answer:

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2 years ago

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What is the completely factored form of x4 + 8x2 – 9? (x + 1)(x – 1)(x + 3)(x + 3) (x+1)(x+1)(x+3){x^2+9} (x2 – 1)(x + 3)(x – 3)

Y_Kistochka [10]

Answer:

(x+1)(x-1)(x^2+9)

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2 years ago

An isosceles triangle ABC has legs of length 24 and a vertex angle that measures 36º . Determine the length of its base, BC , to

iris [78.8K]

Answer: $BC=14.8$

Step-by-step explanation:

By definition, an Isosceles triangle has two equal sides and its opposite angles are congruent.

Observe the figure attached, where the isosceles triangle is divided into two equal right triangles.

So, in this case you need to use the following Trigonometric Identity:

$sin\alpha =\frac{opposite}{hypotenuse}$

In this case, you can identify that:

$\alpha =\angle BAD=\angle CAD=18\°\\\\opposite=BD=CD=x\\\\hypotenuse=AB=AC=24$

Substituting values, and solving for "x", you get:

$sin(18\°)=\frac{x}{24}\\\\24*sin(18\°)=x\\\\x=7.416$

Therefore, the length of BC rounded to nearest tenth, is:

$BC=2(7.416)=14.8$

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2 years ago