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2 years ago

11

I need help simplifying this expression 9•(7-4)^2+9

2 answers:

TEA [102]2 years ago

5 0

Answer:

9×3+11 = 27 I think hope it helps

marshall27 [118]2 years ago

4 0

Answer:

90

Step-by-step explanation:

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Nastasia [14]

Answer:

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Step-by-step explanation:

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3 years ago

Two of the exterior angles of a triangle are $158^\circ$ and $99^\circ.$ Find the third exterior angle, in degrees.

Lisa [10]

Answer:

The third exterior angle is $103^o$

Step-by-step explanation:

Given

$\theta = 158^o$

$\alpha = 99^o$

Required

The third exterior angle $(\beta)$

The exterior angles of a triangle add up to 360 degrees.

So:

$\theta + \alpha + \beta = 360^o$

Make $\beta$ the subject

$\beta = 360^o - (\theta + \alpha)$

Substitute known values

$\beta = 360^o - (158^o + 99^o)$

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Step-by-step explanation:

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