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AveGali [126]
3 years ago
13

80 pounds to 90 pounds, by what percentage did mr. mathewson increase the amount of weight he lifted?

Mathematics
1 answer:
WARRIOR [948]3 years ago
5 0
Mr. Mathewson increased the amount of weight he lifted by 12.5%
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HELP PLEASE!!<br> Finding the missing parts of a triangle.
sleet_krkn [62]

Step-by-step explanation:

 Before we proceed, we must understand that we are dealing with a system of right angled triangles.

  There are two types of right angle triangles';

          45° - 45° - 90°                30° - 60° - 90°

In 45° - 45° - 90°, the adjacent is equal to the opposite

    30° - 60° - 90°, there are three different sides

The longest side faces 90°, the shortest side will face the smallest angle and the intermediate will face 60°

A.

 To find AB, use Pythagoras theorem;

          AB²  = AC² + BC²

          AB²  = 13² + 4²

           AB²  = 169 + 16  = 185

           AB = √185  = 13.6

AB = 13.6

Angle A = 30°

Angle B = 60°

B.

   AB² = BC² + AC²

 The unknown is AC;

      AC² = AB² - BC²

      AC²  = 5²  - 4²

       AC² = 9

       AC = √9 = 3

Angle A = 60°

Angle B = 30°

C.

        AB²  = AC² + BC²

 Insert the parameters and find AC;

        AC² = AB² - BC²

        AC²  = 11²  - 4.4²

        AC²  = 101.64

         AC  = √101.64

         AC = 10.1

Angle A = 30°

Angle B = 60°  

AC = 13

   

5 0
3 years ago
Difficult for me but should be easy for some big brain out there
MariettaO [177]

Answer:

I would say the last one

Step-by-step explanation:

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Answer:

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For number 9 it's x+8= 14 and 7x=21
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Which point on the x-axis lies on the line that passes through point C and is parallel to line AB?
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It is ( 2,0 ) 
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