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Anna11 [10]
2 years ago
9

What is 2x-3y=9 -5x-3y=30

Mathematics
2 answers:
lina2011 [118]2 years ago
8 0
 2x - 3y = 9   ⇒ -10x + 15y = -45
-5x - 3y = 30 ⇒ <u>-10x -   6y =   60</u>
                                      <u>9y</u> = <u>15</u>
                                       9      9
                                       y = 1 2/3
                     2x - 3(1 2/3) = 9
                               2x - 5 = 9
                               <u>     +5  +5</u>
                                     <u>2x</u> = <u>4</u>
                                      2     2
                                       x = 2
                                 (x, y) = (2, 1 2/3)
Shkiper50 [21]2 years ago
3 0
If your in algebra 1 then i'm pretty sure you subtract the 2x and that cancels and subract the 2x with the 9 and you have -3y= -2x+9 so you divide -3 to the -3y, the -2x and positive 9 and your answer will be y=2/3x-3
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The curved urface area of a cone i 140π cm2. What will be the radiu of a cone whoe lant height i 5 cm
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The radius of a cone with a curved surface area of 140π cm² and a slant height of 5 cm will be 28 cm.

<h3>What is curved surface area?</h3>

The region with just curved surfaces, leaving the circular top and base, is referred to as the curved surface area. Total Surface Area is the combined area of the bases and the curved surface. The measurement of a solid's curved surface area is its outer area, which excludes the top and bottom extensions. Surface area of the cylinder that is curved: A right circular cylinder is the solid that results when a rectangle circles around one side and makes a full revolution. The curved surface area of a cylinder (CSA) is also known as the lateral surface area and is defined as the area of the curved surface of any given cylinder having a base radius "r" and height "h".

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The radius of cone that has 5 cm as slant height and 140π cm² as the curved surface area will be 28 cm.

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