<span>In mathematics, a percentage is a number in the fraction of 100. It is often denoted with the symbol of "%", or simply "pct" or "percent". For example, 35% is equivalent to 0.35 or 35/100. The calculator above can take any two values and calculate the third value.</span>
Answer:
<h2>x = -15 and y = -25 ⇒ (-15, -25)</h2>
Step-by-step explanation:
![y=x-10\qquad(1)\\\\y=2x+5\qquad(2)\\\\\text{substitute (2) to (1):}\\\\2x+5=x-10\qquad\text{subtract 5 from both sides}\\\\2x=x-15\qquad\text{subtract x from both sides}\\\\x=-15\\\\\text{Put the value of x to (1):}\\\\y=-15-10\\\\y=-25](https://tex.z-dn.net/?f=y%3Dx-10%5Cqquad%281%29%5C%5C%5C%5Cy%3D2x%2B5%5Cqquad%282%29%5C%5C%5C%5C%5Ctext%7Bsubstitute%20%282%29%20to%20%281%29%3A%7D%5C%5C%5C%5C2x%2B5%3Dx-10%5Cqquad%5Ctext%7Bsubtract%205%20from%20both%20sides%7D%5C%5C%5C%5C2x%3Dx-15%5Cqquad%5Ctext%7Bsubtract%20x%20from%20both%20sides%7D%5C%5C%5C%5Cx%3D-15%5C%5C%5C%5C%5Ctext%7BPut%20the%20value%20of%20x%20to%20%281%29%3A%7D%5C%5C%5C%5Cy%3D-15-10%5C%5C%5C%5Cy%3D-25)
Answer:
5 weeks
needs 75 more $$$
Step-by-step explanation:
Your a should be 30
180-97-53 = 30