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2 years ago

I need help on number 15

Mathematics

1 answer:

garri49 [273]2 years ago

3 0

Okay, you now a triangle has 180º degrees and to add to 180º, you have to add all the numbers you have like this:
2x+x+90 (the box is 90º)=180º; add like terms like 2x+x
3x+90=180; cancel 90 by subtracting it and also subtract 90 from 180
3x=90;divide 3 to isolate x and also divide 90/3
x=30 :)

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vfiekz [6]

Step-by-step explanation:

AO = DO

2x+3 = 5x

3 = 5x-2x

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x = 1

DO = 5(1)=5cm

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2 years ago

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alex41 [277]

Answer:

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Step-by-step explanation

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2 years ago

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tiny-mole [99]

♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫

➷ Since this is an isoceles triangle, you can figure it out easily.

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2 years ago

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tatyana61 [14]

Answer:

Step-by-step explanation:

5.(a)

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2 years ago

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dmitriy555 [2]

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