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2 years ago

Which triangles in the diagram are congruent?

Mathematics

1 answer:

GenaCL600 [577]2 years ago

4 0

Answer: triangle 1, triangle 2, and triangle 3

Step-by-step explanation:

Triangles 1 and 3 are congruent by SAS. So, by CPCTC, all three sides are congruent, making triangle 2 congruent to them as well by SSS.

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COME ON PLSSSSSS HELP I'VE POSTED THIS BEFORE :(

mr Goodwill [35]

Here are your points (-9,-8), (-6,-2), (-2,-6)

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2 years ago

What is the value of the rational expression 2x^2+5x+9/x^2+2x-1 when x=-2

Sergio039 [100]

Answer:

The value of the Rational expression when $x=-2$ is: $-7$

Step-by-step explanation:

For this exercise is important to remember:

When a negative number is raised to an even power, the result will be positive.
The multiplication of signs:

$(+)(+)=+\\(-)(-)=+\\(-)(+)=-$

Then, given the following Rational expression:

$\frac{2x^2+5x+9}{x^2+2x-1}$

You need to follow these steps in order to find its value when $x=-2$ :

1. Substitute the given value of "x" ( $x=2$ ) into the expression:

$\frac{2(-2)^2+5(-2)+9}{(-2)^2+2(-2)-1}$

2. Evaluate and simplify:

$\frac{2(4)+5(-2)+9}{4+2(-2)-1}=\frac{8-10+9}{4-4-1}=\frac{7}{-1}=-7$

5 0

2 years ago

Read 2 more answers

How is this expression written with exponents? 3 . 3 . x . x . x . x

marin [14]

Solve:-

Write it down again:-

3 · 3 · x · x · x · x

We will write it like this:-

3 · 3 · x³

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3 years ago

A relay race is 1/10 kilometer long. Four athletes will run an equal distance to complete the relay. How far does each athlete r

Over [174]

25 metres. Because 1/10th of a kilometre is a 100 metres. And four athletes divided by 100 metres is 25 metres.

8 0

2 years ago

Read 2 more answers

The length of the base of an isosceles triangle is x. The length of the leg is 2x-2. The Perimeter of the triangle is 46. Find X

Contact [7]

Answer:

Step-by-step explanation:

The length of the base of an isosceles triangle is x. The length of the leg is 2x-2. The Perimeter of the triangle is 46. Find X.

2x - 2 + 2x - 2 + x = 46

5x - 2 - 2 = 46

5x = 50

x = 50 : 5

x = 10

8 0

2 years ago