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Oduvanchick [21]

4 years ago

5

You can use (absolute length/proportions) or (angle ratios/corresponding parts) of a triangle to find the missing parts of a tri

angle that is similar to another.
(choose between (absolute length/proportions) and ((angle ratios/corresponding parts)

1 answer:

lys-0071 [83]4 years ago

5 0

Answer:

I believe that the answer is (proportions) or (angle ratios).

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Which would be the best method to use to solve the following equations? Explain your reasoning.

o-na [289]

A. square root property

$3x^2-192=0\\x^2-66=0\\x^2=66\\x= -\sqrt{66} or \sqrt{66}$

it has one value with x which is x^2 and it cn be easily solved without having to factorise, quadratic formula cant be used as it need ax^2+bx+c=0 format

B. factorising

$x^2-x-6=0\\x^2+2x-3x-6=0\\(x+2)(x-3)=0\\x+2=0 and x-3=0\\x= -2 \\x= 3$

i just felt like this was easier to factorise than the other 2 options left

C. Completing the square

$x^2-6x-7=0\\(x-3)^2=0\\x= -1\\x= 7$

same reason personal preference

D- Quadratic

$x^2-17x-7=0\\x=\frac{-(-17)+\sqrt{(-17)^2-4(1)(-7)} }{2(1)} \\x=\frac{-(-17)-\sqrt{(-17)^2-4(1)(-7)} }{2(1)}\\x=17.4\\x=-0.402$

the 17 kinda threw me off and i didnt wanna get on factorising or doing completing the square so quadratic formal

7 0

3 years ago

Factor the polynomial:3x^3-x^2-15x+5

lina2011 [118]

(x^2-5)(3x-1)
Here's how I got this answer:
I found the GCF for each part of the polynomial.
3x^3 and -15x both contain 3x, and -x^2 and 5 share -1.
I then can divide the polynomial by 3x-1, and I get x^2-5
(Okay, that's not what I really did, but I can solve these on sight and don't remember the proper way to do it.)

6 0

3 years ago

A line passes through the points (-4,5) and (1,-5). Write the equation of the line in slope-

sweet [91]

Answer:

y = -2x - 3

Step-by-step explanation:

Slope: (5 - - 5)/(-4 -1) = 10/-5 = -2

y-intercept: 5 - (-2)(-4) = -3

4 0

3 years ago

Plzzz help ?? Don't know

tensa zangetsu [6.8K]

I think its c yo...............

8 0

3 years ago

The three decided to participate in a walkathon to raise additional money for the shelter. Sarah walked 5 miles less than twice

quester [9]

I get w = 15. So Semir walked 15 miles and Sarah walked (2(15) - 5) miles, or 25 miles.

6 0

3 years ago

Read 2 more answers