To answer this question you can use the Pythagorean Theorem Which states that a squared plus b squared equals c squared. C is the hypotenuse of a triangle (one of the diagonals forming the X). The hypotenuse is the side directly across from the right angle. A and b are both 12, so 12 squared plus 12 squared is 288. To solve for c, find the square root of 288, which is approximately 17 inches. Double this (one for each line in the X and you need approximately 34 inches of ribbon. Always label your answers!
Step-by-step explanation:
<em>Perimeter </em><em>of </em><em>a </em><em>rectangle</em><em>=</em><em> </em><em>2</em><em>L</em><em> </em><em>+</em><em> </em><em>2</em><em>W</em>
<em>let </em><em>the </em><em>length </em><em>be </em>2x-1<em> </em><em>and </em><em>breadth</em><em>/</em><em> </em><em>width </em><em>=</em><em> </em>3x+5
52= 2x-1 + 3x+5
52= 5x +4
<em> </em><em>collect </em><em>like </em><em>terms</em><em>;</em>
52-4 = 5x
48=5x
<em>divide </em><em>by </em><em>the </em><em>co- </em><em>efficient </em><em>of </em><em>X</em>
<em>x=</em><em> </em><em>9</em><em>.</em><em>6</em><em>.</em>
<em>hope </em><em>it </em><em>helps.</em><em> </em><em>pls </em><em>like </em><em>and </em><em>follow </em><em>:-)</em><em>:-)</em>
Answer:
3
Step-by-step explanation:
31% × y = 89,9
y = 89,9 × 100/31
= 290
Therefore 31% of 290 is 89,9
