help please!

- anonymous

help please!

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- anonymous

@surjithayer

- anonymous

##### 1 Attachment

- anonymous

3x+30=90
3x=90-30=60
x=?

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## More answers

- anonymous

@iambatman

- anonymous

@KyanTheDoodle

- anonymous

@iambatman

- anonymous

@iambatman

- anonymous

What's up?

- anonymous

please help

- anonymous

and fast please :)

- anonymous

3x+30=90 that looks good

- anonymous

Just solve for x

- anonymous

Because |dw:1433222505160:dw|

- anonymous

ok ?

- anonymous

Where are you confused?

- anonymous

They must add up to 90 degrees, as a right angle is always 90 degrees.

- anonymous

ok

- anonymous

and then

- anonymous

So we add the two angles 30+3x and make it equal to 90, 3x+30 = 90

- anonymous

Now solve for x to find the angle

- anonymous

i got 40

- anonymous

Can you please show you work? I know you expect me to do the work, but that will not benefit you, if you don't know how to do the algebra you are more than welcome to ask, don't worry about being wrong.

- anonymous

|dw:1433222874705:dw|

- anonymous

its 30! sorry

- anonymous

When we are doing algebra, we use the opposite property of what exists to move things.
Say we're given something like \[5x=30\] notice the x is attached to the 5 that implies x is being multiplied by 5 as such
\[5 \times x = 30\]
So we say mhm, alright so what can we do to move the 5 away from x so we can get x alone, and also note what you do to one side you must always do it to the other.
So we divide both sides by 5...oh I see you know how to do algebra but your arithmetic is wrong.

- anonymous

Try again :)

- anonymous

Your algebra is correct, but your division is wrong

- anonymous

20!

- anonymous

There we go! I knew you could do it :)

- anonymous

:)

- anonymous

Ned wrote the following statement:
"You can only draw one unique isosceles triangle that contains an angle of 80Â°."
Which statement is true?
Ned is correct, because only one unique triangle can be drawn with the given information.
Ned is incorrect, because the triangle described cannot be drawn with the given information.
Ned is incorrect, because more than one triangle can be drawn with the given information.

- anonymous

its c.. prettY sure :) @iambatman

- anonymous

@iambatman

- anonymous

Sounds good

- anonymous

okk :)

- anonymous

Linda described four triangles as shown below:
Triangle A: All sides have length 7 cm.
Triangle B: All angles measure 60Â°.
Triangle C: Two sides have length 8 cm, and the included angle measures 60Â°.
Triangle D: Base has length 8 cm, and base angles measure 55Â°.
Which triangle is not a unique triangle?
Triangle A
Triangle B
Triangle C
Triangle D

- anonymous

b?

- anonymous

@iambatman

- anonymous

Are you doing a test?

- anonymous

homework

- anonymous

A unique triangle is one that is not equilateral

- anonymous

So what you mentioned is a equilateral triangle as all angles are the same.

- anonymous

yes

- anonymous

And can only be drawn one way, so something like 3 cm, 5 cm, 7 cm

- anonymous

yea:)

- anonymous

so im right?

- anonymous

b?

- anonymous

@iambatman

- anonymous

Yes, that seems good

- anonymous

:)

- anonymous

@iambatman

##### 1 Attachment

- anonymous

Supplementary angles add up to 180, so \[5x+20+50=180\] solve for x

- anonymous

|dw:1433224140932:dw|

- anonymous

@iambatman

- anonymous

@iambatman

- anonymous

Yup

- anonymous

:)

- anonymous

sorry, b is not correct,it is d

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