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grigory [225]
3 years ago
12

An ______ triangle is also an acute and equilateral triangle.

Mathematics
2 answers:
Alla [95]3 years ago
4 0

Answer:

Right

Step-by-step explanation:

A right triangle has acute angles and is an equilateral triangle.

Colt1911 [192]3 years ago
4 0

Equiangular Triangle

The angles A,B and C always remain equal in measure. The sides of an equiangular triangle are all the same length (congruent), and so an equiangular triangle is really the same thing as an equilateral triangle.

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Choose the correct simplification of the expression (2x - 6)(3x2 - 3x - 6). (4 points) Select one: a. 6x3 - 24x2 + 6x + 36 b. 6x
attashe74 [19]

Answer:

  a.  6x^3 - 24x^2 + 6x + 36

Step-by-step explanation:

These are expanded using the distributive property, which is also used for collecting terms.

  (2x - 6)(3x2 - 3x - 6) = 2x(3x^2 - 3x - 6) - 6(3x^2 - 3x - 6)

  = 6x^3 -6x^2 -12x -18x^2 +18x +36

  = 6x^3 +(-6-18)x^2 +(-12 +18)x +36

  = 6x^3 -24x^2 +6x +36 . . . . . . matches selection A

_____

<em>Comment on strategy</em>

For multiple-choice questions, it often works well to find a way to identify a viable answer with the minimum amount of work. Comparing these answer choices, you can see that determining the correct values of the x-term and the constant term will let you pick the right choice.

The constant term is easy, because it is simply the product of the constants (-6)(-6) = 36. This narrows the choices to A and C.

The x-term will be the sum of products of x-terms and constants:

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

This narrows the choices to A alone.

5 0
4 years ago
A line has a y intercept of 8 and a slope of -2. What is the equation of a line that is perpendicular to this line.?
Cerrena [4.2K]
Use the equation of a line: y = mx + c
- “M” stands for the slope
- “C” is the coordinate “y” when the line intercepts the y axis.

Any line which is perpendicular to another has the opposite gradient/slope of the original line: instead of 2, we now have 1/2. Easy way to do this is simply give it the reverse sign (+ or -) and flip the numerator and denominator.

Therefore, we replaced m with 1/2.

Usually to find c and therefore complete the equation, we need a coordinate which the line crosses, to which we substitute its values into y and x and solve for c.

Since we aren’t given that though, we can just do factor of elimination, giving C) as your answer because it is the only one with the gradient which we found.

6 0
4 years ago
Read 2 more answers
The width of a rectangle is 1m less than half of its length, and the perimeter is 46m. Find the dimensions.
VLD [36.1K]
The width is 15.
The length is 31.
6 0
4 years ago
Considering only the values of <img src="https://tex.z-dn.net/?f=%5Cbeta" id="TexFormula1" title="\beta" alt="\beta" align="absm
morpeh [17]

\large\boxed{Answer:}

We will use trigonometric identities to solve this. I will use θ (theta) for the angle.

First of all, we know that cotθ = 1/tanθ. This is a trigonometric identity.

We can replace cotθ in the expression with 1/tanθ.

sin\theta tan\theta sec\theta \frac{1}{tan\theta}

Simplify: 1/tanθ * tanθ = tanθ/tanθ = 1

So now, we have:

sin\theta sec\theta

Next, we also know that secθ = 1/cosθ. This is another trigonometric identity.

We can replace secθ with 1/cosθ in our expression.

sin\theta \frac{1}{cos\theta}

Simplify:

\frac{sin\theta}{cos\theta}

Our third trigonometric identity that we will use is tanθ = sinθ/cosθ.

We can replace sinθ/cosθ with tanθ.

Now we have as our final answer:

\large\boxed{b.\ tan\theta}

Hope this helps!

7 0
3 years ago
Read 2 more answers
Please help me asap!!!
Dafna11 [192]

you need help

nice for you                                                                                                                                   / fyi this is payback

5 0
4 years ago
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