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amm1812
3 years ago
13

Dont send the ansr in a file... Find the measure of angle acd (20 points)

Mathematics
1 answer:
Firdavs [7]3 years ago
6 0

Answer:

∠ ACD = 130°

Step-by-step explanation:

∠ ABC = 180° - 120° = 60° ( adjacent angles on a straight line )

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ ACD is an exterior angle of the triangle , then

∠ ACD = 70° + 60° = 130°

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Enter your answer and show all the steps that you use to solve this problem in the space provided
VashaNatasha [74]

Answer: x = -4, x = 5

Step-by-step explanation:

You can use the substitution method for this problem.

y = x^{2} + 2x, but y also = 3x +20.

Because of this, you can determine that x^{2} +2x = 3x + 20 because they are both equal to the same thing, y.

Solve the quadratic equation you got from substitution:

x^{2} + 2x = 3x + 20

x^{2} -x = 20

x^{2} -x -20 = 0

You can factor this equation:

(x+4)(x-5) = 0

x = -4, x = 5

5 0
3 years ago
Classify the following triangle by its side lengths:
Sonja [21]
With two equal sides it’s called isosceles triangle
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3 years ago
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ASAP!! <br> what is the polar form of -2sqrt3 -6i?
velikii [3]

Answer:

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Step-by-step explanation:

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3 years ago
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Ms. Gonzales is investing $17000 at an annual interest rate of 6%
Lena [83]

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Step-by-step explanation:

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3 years ago
Which value of the vanable is a solution of the inequality? t&lt;-6<br> 7<br> 6<br> -6<br> -7
oksian1 [2.3K]

Answer:

-7

Step-by-step explanation:

-7 is a solution of the inequality t<-6

By the way, for the number -6, you can think about a temperature below zero. When it is freezing 6 degrees below zero (-6) it is pretty cold.

The question is which number(s) can you substitute for t so that the formula (the inequality) is True.

So let's try for each given value and substitute it for t in t<-6

if you substitute 7 for t you get this:

Is 7 smaller then -6 ?

No that is not true because 7 is bigger then -6.

if you substitute 7 for t you get this:

Is 7 smaller then -6 ?

No that is not true because 7 is much bigger then -6.

if you substitute 6 for t you get this:

Is 6 smaller then -6 ?

No that is not true because 6 is much bigger then -6.

if you substitute -6 for t you get this:

Is -6 smaller then -6 ?

No, that is NOT true because -6 is exactly the same as -6 but NOT smaller then -6...

if you substitute-7 for t you get this:

Please think about temperatures below zero again.

Is -7 colder the -6 ? If so, then the statement is true...

Is -7 smaller then -6 ?

Yes that is true!

So -7 is a solution of the inequality t<-6

6 0
3 years ago
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