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Elan Coil [88]
3 years ago
14

What property is x+(3x+20)=180

Mathematics
1 answer:
Aleksandr [31]3 years ago
6 0

The answer is the distributive property

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Given a line segment containing the points A,B, & C, in order, if AB is 11 and BC is 12, then the length of AC would
Shalnov [3]

Answer: 23

Step-by-step explanation:

AB + BC = AC

AC = 11 + 12 = <u>23</u>

4 0
2 years ago
I need help on #3 please!
ad-work [718]
The answer is whole
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3 years ago
Given: cosθ= -4/5 , sin x = -12/13 , θ is in the third quadrant, and x is in the fourth quadrant; evaluate tan 1/2 θ
mrs_skeptik [129]

Answer:

Step-by-step explanation:

If you're looking for what the half angle of the tangent of theta is, I'm a bit confused as to why you think the angle in the 4th quadrant, x, is relevant.  But maybe you don't know it isn't and it's a "trick" to throw you off.  Hmm...

Anyways, the half angle identity for tangent is

tan(\frac{\theta}{2})=\frac{sin\theta}{1+cos\theta}

There are actually 3 identities for the tangent of a half angle, but this one works just as well as either of the others do, so I'm going with this one.  

If theta is in QIII, the value of -4 goes along the x axis and the hypotenuse is 5.  That makes the missing side, by Pythagorean's Theorem, -3.  Filling in our formula:

tan(\frac{\theta}{2})=\frac{-\frac{3}{5} }{1+(-\frac{4}{5}) } which simplifies a bit to

tan(\frac{\theta}{2})=\frac{-\frac{3}{5} }{\frac{5}{5} -\frac{4}{5} }  and a bit more to

tan(\frac{\theta}{2})=\frac{-\frac{3}{5} }{\frac{1}{5} }

Bring up the lower fraction and flip it to divide to get

tan(\frac{\theta}{2})=-\frac{3}{5}*\frac{5}{1} which of course simplifies to

-3.  Choice A.

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3 years ago
Evaluate the expression 7+3²× 2​
disa [49]

Answer:

25

Step-by-step explanation:

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3 years ago
Which shows a reflection over the x-axis?
a_sh-v [17]

Answer:

Probably a bit late but its A the first one ;P

Step-by-step explanation:

8 0
2 years ago
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