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valkas [14]
3 years ago
12

40 POINTS AND WILL MARK BRAINLIEST TO CORRECT ANSWER What kind of triangle is △BCD? Explain.

Mathematics
2 answers:
Degger [83]3 years ago
6 0

Step-by-step explanation:

obtuse angle m<CDB=180 -70=110

klasskru [66]3 years ago
5 0

Question Below

What kind of triangle is △BCD?

Answer:

Hi, There! I'm here to Help :)

Acute triangle; m∠CDB = 180 − 130 = 50 and m∠2 = 180 − 70 − 50 = 60

Step-by-step explanation:

Hope this helps!

An obtuse triangle is one that has an angle greater than 90°. Because all the angles in a triangle add up to 180°, the other two angles have to be acute (less than 90°).

*FrozenVines*

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maria [59]

Answer:

First option:  3x^2-5x=-8

Second option: 2x^2=6x-5

Fourth option: -x^2-10x=34

Step-by-step explanation:

Rewrite each equation in the form ax^2+bx+c=0 and then use the Discriminant formula for each equation. This is:

D=b^2-4ac

1) For 3x^2-5x=-8:

 3x^2-5x+8=0

Then:

D=(-5)^2-4(3)(8)=-71

Since D this equation has no real solutions, but has two complex solutions.

2) For 2x^2=6x-5:

 2x^2-6x+5=0

Then:

D=(-6)^2-4(2)(5)=-4

Since D this equation has no real solutions, but has two complex solutions.

3) For 12x=9x^2+4:

 9x^2-12x+4=0

Then:

D=(-12)^2-4(9)(4)=0

Since D=0 this equation has one real solution.

4) For -x^2-10x=34:

 -x^2-10x-34=0

Then:

D=(-10)^2-4(-1)(-34)=-36

Since D, this equation has no real solutions, but has two complex solutions.

3 0
3 years ago
A student visiting the Sears Tower Skydeck is 1353 feet above the ground. Find the distance the student can see to the horizon.
kumpel [21]
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3 years ago
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I really need help with this my deadline is very soon​
Harman [31]

Answer:

(3)\ y = -x

(5)\ y = -3x -2

Step-by-step explanation:

Required

The equation in slope intercept form

Solving (3):

m = -1

(x_1,y_1) =(4,-4)

The equation in slope intercept form is:

y = m(x - x_1) + y_1

This gives:

y = -1(x - 4) -4

Expand

y = -x + 4 -4

y = -x

Solving (5):

m = -3

(x_1,y_1) = (1,-5)

The equation in slope intercept form is:

y = m(x - x_1) + y_1

This gives:

y = -3(x - 1) - 5

Expand

y = -3x + 3 - 5

y = -3x -2

8 0
3 years ago
Math question down below
marusya05 [52]
18/27 can be reduced to 2/3 so the second option should be the correct answer
5 0
4 years ago
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I NEED HELP ASAP! Which equation is represented by the graph below?
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Answer:B

Step-by-step explanation:

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