Let P(x,y) be a point on the parabola. The definition of a parabola is the squared distance from P to focus F(2,2) equals the squared distance to the directrix x=8.
squared distance from P(x,y) to focus F(2,2)
(x - 2)² + (y - 2)²
squared distance from P(x,y) to the directrix x=8.
(x-8)²
Those are equal in a parabola,
(x - 2)² + (y - 2)² = (x-8)²
x² - 4x + 4 + y² - 4y + 4 = x² - 16x + 64
y² - 4y - 46 = -12x
That's a sideways parabola,
x = -(y² - 4y - 46)/12
All you have to do is just put the same variable on the same side as each other.
131+-5 is equal to 126
To make it less confusing it’s just 131-5
To multiply 36*5.9 one way of doing it without a calculator and in a way that I can show you here you can do. 5.8*36 is the same as saying 36+36 5.9 times so we can first off take 36*5=180 and then to find are .9 part of 36 we would have to take 36*.9=32.4 so now we take 180+32.4=212.4 and that is are end answer.
Enjoy!=)
Answer:
11. 10, 20,30,40,50,60,70
12. 35, 45,55,65,75,85,95
Step-by-step explanation:
10 dollars per week for 7 weeks in equivalent to 10x7 which equals $70.
If you already had $25 you would do 10x7+25. Using PEMDAS you would multiply first (10x7=70) then add 25 (70+25=95)