Will vote ! ! !

what of these definitions describes the word vertices and why?

a) a plane figure formed by the intersection of a double cone and a plane

c) the chord that passes through the center point of a circle

d) two lines that intersect at 90 degree angles

f) the endpoints of the major axis

g) the "ovalness" of an ellipse

h) the point of intersection of the major and minor axis

j)the endpoints of the minor axis

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!