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Ksenya-84 [330]
3 years ago
6

Plz plz help me on number 15 plz plz help me.

Mathematics
1 answer:
GrogVix [38]3 years ago
7 0
The answer is 30578.33
Just here to help ;)
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Given: △ABC, BC>AC, D∈ AC , CD=CB Prove: m∠ABD is acute
nevsk [136]
I want you to imagine as you read this or you can draw through the help of my explanation and see yourself:

1↪Draw triangle ABC where BC>AC

2↪D is any point on AC such that CD=CB

3↪Roughly drawing , you can assume CD=CB and and join BD

4↪SO triangle ABC which is a big triangle is divided into Triangles ABD and BDC

5↪See in triangle BDC ,CD=CB so, base angles of isosceles triangle are equal:
<CDB=<CBD = x (assume) which means x is acute angle since CDB and CBD are are in same triangle with same measure and there can't be any two obtuse angle in any traingle. So x must be acute.

6↪Now see in traingle ABD,

<ADB=180-<CDB=180-x=obtuse angle
...check yourself ...just subtract any acute angle from 180 you will get only obtuse angle (ie angle greater than 90)
That means in triangle ABD , one angle ADB is obtuse which means remaining <ABD and < BAD are acute. [PROVED]

❇Main Concept Used Here:
↪In any triangle there can be maximum of one obtuse angle...so remaining two must be acute angle otherwise interior angles sum can't be equal to 180.
5 0
2 years ago
4) Which linear inequality represents the solution set graphed?
horsena [70]

Answer:

D)€÷√€€$&7$&7$&dy+&"&_

3 0
2 years ago
Cube A has a side length of 3 meters and cube B has a side length of 6 meters. Calculate the volume of the two cubes. Which stat
Pavel [41]
A = 3 cubed = 27 cubic meters 

B = 6 cubed = 216 cubic meters.


Cube B is 8 times larger than cube A. 
4 0
2 years ago
If 7y + 42 &lt;14 then which among the following is true​
lutik1710 [3]

Answer:

y

Step-by-step explanation:

Given

7y + 42

Required

Determine the true statement

<em>Options are not given; but, the question can still be attempted.</em>

<em></em>7y + 42<em></em>

<em></em>

Collect Like Terms

7y < 14 -42

7y < -28

Divide through by 7

\frac{7y}{7} < -\frac{28}{7}

<em></em>y<em> -- This is true</em>

5 0
2 years ago
What is the value of y in the equation 5x+2y=20, when x=0.3
Rasek [7]

5x+2y=20

Substitute 0.3 for x

5(0.3)+2y=20

Multiply 5 by 0.3

1.5+2y=20

Subtract 1.5 from both sides

2y=18.5

Divide 2 on both sides

Final Answer: y= 9.25

8 0
3 years ago
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