Use the Distance Formula to write an equation of the parabola. A parabola and a directrix are graphed on a coordinate plane. The horizontal axis is labeled x and the vertical axis is labeled y. The parabola opens upward with vertex lying at ordered pair 0 comma 0 and focus F at ordered pair 0 comma 1. The parabola passes through the point labeled P with ordered pair x comma y. A line segment obtained by joining point F and point P. A directrix of equation y equals negative 1 is drawn parallel to x-axis. A point D with ordered pair x comma negative 1 lies on the directrix and joined with the point P. Line segment P D is perpendicular to the directrix. Point F and point P are joined to form line segment P F.

An equation of the parabola is $y=$
.

tickets for the harlem globetrotters

show at michigan state university in

2010 cost $16, $23, or, for vip seats, $40.

total revenue = 16x + 23y + 40z

if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, sales of all three kinds of tickets would

total $46,575.

16x + 23y + 40z = 46575, how many of each kind of ticket would

have been sold?

solve for x, y and z

x − 9z = 0

x − y − z = 55

16x + 23y + 40z = 46575

x = 1170

y = 985

z = 130

welcome!

step-by-step explanation:

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places