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Paha777 [63]
3 years ago
9

PLEASE HELP 13 INSTEAD OF FIVE POINTS!!!! I REALLY NEED HELP

Mathematics
2 answers:
devlian [24]3 years ago
6 0
A is what the answer is
Inga [223]3 years ago
6 0

Answer:

y = 3/7 x - 3

Step-by-step explanation:

The first number should be positive because the dots are slowly going up, not down. The first number also cannot be 7/3 because the slope of that would be over 2, and in this graph, the slope isn't even more than one. The last answer we have to eliminate is y = 3/7x + 3 because the +3 is the y-intercept, and in the graph, it doesn't touch the positive 3. So the answer is y = 3/7x - 3.

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In triangle abc, the perimeter is 36, and ab=ac. line ad is perpendicular to bc at the point d, and triangle abd's perimeter is
Musya8 [376]
Let x=ab=ac, and y=bc, and z=ad.

Since the perimeter of the triangle abc is 36, you have:

Perimeter of abc = 36
ab + ac + bc = 36
x + x + y = 36
(eq. 1) 2x + y = 36

The triangle is isosceles (it has two sides with equal length: ab and ac). The line perpendicular to the third side (bc) from the opposite vertex (a), divides that third side into two equal halves: the point d is the middle point of bc. This is a property of isosceles triangles, which is easily shown by similarity.

Hence, we have that bd = dc = bc/2 = y/2 (remember we called bc = y).

The perimeter of the triangle abd is 30:

Permiter of abd = 30
ab + bd + ad = 30
x + y/2 + z =30
(eq. 2) 2x + y + 2z = 60

So, we have two equations on x, y and z:

(eq.1) 2x + y = 36
(eq.2) 2x + y + 2z = 60

Substitute 2x + y by 36 from (eq.1) in (eq.2):

(eq.2') 36 + 2z = 60

And solve for z:

36 + 2z = 60 => 2z = 60 - 36 => 2z = 24 => z = 12

The measure of ad is 12.

If you prefer a less algebraic reasoning:

- The perimeter of abd is half the perimeter of abc plus the length of ad (since you have "cut" the triangle abc in two halves to obtain the triangle abd).

- Then, ad is the difference between the perimeter of abd and half the perimeter of abc:

ad = 30 - (36/2) = 30 - 18 = 12
4 0
3 years ago
Read 2 more answers
Heeellllppp~ I beg you, I'm crying~ because I have been waiting for a long time now and I have asked this question multiple time
sp2606 [1]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
-1(2x+3)-2(x-1) simplified
Archy [21]

Answer:djd

Step-by-step explanation:weljfnw

6 0
3 years ago
A pebbe falls into a pond. From the surface, it descends atf a rate of two feet get around. Where us the pebble in relation to t
Rashid [163]
The pebble slowly falls and it's in the middle of the surface and bottom
4 0
3 years ago
For the expression, combine like terms and write an equivalent expression 3 points
Simora [160]

Answer:

5+7x

Step-by-step explanation:

1/2(6-4x) +2 +9x

3-2x+2+9x

5+7x

4 0
3 years ago
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