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ASHA 777 [7]
3 years ago
8

Please please help me answer this

Mathematics
1 answer:
lana66690 [7]3 years ago
5 0

Answer:

x=40

Step-by-step explanation:

the equation

60+3x= 180,

3x=120,

x= 40

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Simplify the expression b - 7 + b - 8
natulia [17]

Answer:

2b - 15

Step-by-step explanation:

b - 7 + b - 8  

You combined the two b's correctly, but didn't combine the two constants, -7 and -8.  

Those combine to   -7 + (-8)  = -7 - 8  = -15,  so the final answer is

2b - 15

you have -7 and are subtracting 8 more, so you are moving 8 units left on the number line, so it has to get more negative.

3 0
3 years ago
If triangle ABC is dilated by a scale factor of 2 with a dilation center of A, what will be the coordinates of point b’?
mojhsa [17]

Answer:


In the given figure the sides of triangle measures as follows:


AB= 4 units,


BC= 6 units,


Since triangle ABC is right angled triangle, to find AC we will have to use Pythagorean theorem,


AB² + BC² = AC²


Plugging the values of AB and BC to find AC,


4² + 6² = AC²


16+36=AC²


AC = 7.48


Now if the triangle is dilated by a scale factor of 2, each side will be multiplied by 2 to get the new triangle A'B'C'


side A'B' = 2* AB = 2*4= 8 units


side B'C' = 2* BC = 2*6 =12 units


side A'C' = 2*AC = 2*7.48 = 14.96 units


Perimeter of triangle = sum of three sides


Perimeter of triangle A'B'C' = A'B' + B'C' + A'C'= 8+12 + 14.96 = 34.96 units.


Perimeter of triangle ABC = AB+BC + AC = 4+6+7.48 = 17.48 units.


Perimeter of triangle A'B'C' = 2* Perimeter of triangle ABC


The perimeter of new triangle A'B'C' is 34.96 units which is twice that of triangle ABC.


Answer : A) The perimeter of A'B'C' is 2 times the perimeter of ABC.



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3 years ago
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Step-by-step explanation:

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Answer is 9.

I think this is helpful. Vote it and like me

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The width of the rectangle is 11.5
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2 years ago
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