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2 years ago

I need help how do you solve #4

Mathematics

2 answers:

Sloan [31]2 years ago

5 0

A + B + C = 180

A = B --> B = A

A = 4·C --> C = 1/4*A

A + A + 1/4*A = 180

2.25*A = 180

A = 80

Inessa05 [86]2 years ago

4 0

In triangle ABC, AB = BC. it's isosceles triangle so <A = <B

Lets x = measure of angle C, so <C = x

<A is 4 times <C so <A = 4x but <A = <B so <A = <B = 4x

Sum of interior angles in a triangle = 180

x + 4x + 4x = 180

9x = 180

x = 20

<A = 4(20) = 80°

Answer is (3) . 80°

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Doss [256]

Step-by-step explanation:

I got you,

a) Work...

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Second equation: y = 2x + 11

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<u>Answer for part a: If a customer wants to rent shoes and play two games, they'll pay more with the new price plan. With the current price plan, they'll pay 11 dollars, but with the new price plan, they'll pay 15 dollars.</u>

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I hope this helps :)

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How to solve such questions?

Such Questions can be easily solved just by some Algebraic manipulations and simplifications. We just try to make our expression in the form which question asks us. This is the best method to solve such questions as it will definitely lead us to correct answers. One such method is completing the square method.

Completing the square is a method that is used for converting a quadratic expression of the form $ax^{2} + bx + c$ to the vertex form

$a(x - h)^{2} + k$ . The most common application of completing the square is in solving a quadratic equation. This can be done by rearranging the expression obtained after completing the square: $a(x + m)^{2} + n$ , such that the left side is a perfect square trinomial