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3 years ago

What is the value of y? Enter your answer in the box. y =

Mathematics

2 answers:

Lorico [155]3 years ago

5 0

since this is an isosceles triangle

5x =40

divide by 5

x=8

the sum of all angles in a triangle is 180

5x+40 + 2y+20 = 180

substitute 40 in for 5x

40 + 40 + 2y+20 = 180

combine like terms

100 + 2y = 180

subtract 100 from each side

2y = 80

divide by 2

y= 40

masha68 [24]3 years ago

4 0

Y=40 because x=8 making the two bottom angles 40 each and leaving the last angle to be 100 and 100+40+40= 180. Hope this help

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torisob [31]

Answer:

Step-by-step explanation:

Given the equation, $200 + 10x = 120 + 15x$ , let's solve for x as follows,

Subtract 200 from both sides

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Subtract 15x from both sides

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Answer:

The correct option is B.

Step-by-step explanation:

The area of triangle is

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It is given that the base of the triangle is 10 inch and the height of the triangle is 14 inch.

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Therefore the area of triangle is 70 square inch and the option B is correct.

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