Write the equation of a parabola with a vertex at (-5, 2) and a directrix y = -1.

Options are:

y minus 2 equals one-twelfth times the quantity x plus 5 squared

y minus 2 equals one-fourth times the quantity x plus 5 squared

y plus 2 equals one-twelfth times the quantity x minus 5 squared

x plus 5 equals negative one-twelfth times the quantity y minus 2 squared

First one

Step-by-step explanation:

(x - h)² = 4p(y - k)

(h,k) = (-5,2)

p = 2 - -1 = 3

(x - -5)² = 4(3)(y - 2)

(x + 5)² = 12(y - 2)

y - 2 = (1/12)(x + 5)²

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!