Using subtraction of the y values you get 4x=5, x=5/4
Further substitution proves this to be true:)
Answer:
Step-by-step explanation:
The most important part of this question is the estimation. That means you round either up or down to get whole numbers.
You can make - 37.44 either - 40 or - 35
You can make 4.8 into 5
So the answer should lie between -40/5 = - 8
or
The answer should be between - 35/5 = - 7
Use your calculator to check it.
-37.44 ÷ 4.8 = - 7.8
This skill is very handy when shopping or writing a test. It you get an outrageous answer like - 21.44 you know you have done something wrong.
Make an assumption . ''to assume''
X is going to be 5(: please brainlist
Answer:
<h2>Length = 14</h2><h2>Width =7</h2>
Step-by-step explanation:
![Let \:the\:length\:be \:x\\Perimeter = 42 cm\\Width = x -7\\\\P = 2(l+b)\\\\42 = 2(x+(x-7))\\\\42 = 2(x +x-7)\\42 = 2(2x-7)\\42 = 4x -14\\Collect\:like\:terms\\\\42+14=4x\\56 = 4x\\\\Divide \:both\:sides\:of\:the\:equation\:by \:4\\\frac{56}{4} = \frac{4x}{4} \\\\14 =x\\Length = 14\\Width = x-7\\Width = 14-7\\\\Width = 7](https://tex.z-dn.net/?f=Let%20%5C%3Athe%5C%3Alength%5C%3Abe%20%5C%3Ax%5C%5CPerimeter%20%3D%2042%20cm%5C%5CWidth%20%3D%20x%20-7%5C%5C%5C%5CP%20%3D%202%28l%2Bb%29%5C%5C%5C%5C42%20%3D%202%28x%2B%28x-7%29%29%5C%5C%5C%5C42%20%3D%202%28x%20%2Bx-7%29%5C%5C42%20%3D%202%282x-7%29%5C%5C42%20%3D%204x%20-14%5C%5CCollect%5C%3Alike%5C%3Aterms%5C%5C%5C%5C42%2B14%3D4x%5C%5C56%20%3D%204x%5C%5C%5C%5CDivide%20%5C%3Aboth%5C%3Asides%5C%3Aof%5C%3Athe%5C%3Aequation%5C%3Aby%20%5C%3A4%5C%5C%5Cfrac%7B56%7D%7B4%7D%20%3D%20%5Cfrac%7B4x%7D%7B4%7D%20%5C%5C%5C%5C14%20%3Dx%5C%5CLength%20%3D%2014%5C%5CWidth%20%3D%20x-7%5C%5CWidth%20%3D%2014-7%5C%5C%5C%5CWidth%20%3D%207)