Sarah has 18 postcards in her postcard collection. she decides that from now on, every time she goes on vacation she will buy 5 postcards to add to her collection. write an equation to represent the number of postcards, y , she will have after a certain number of vacations, x .

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply

9987

step-by-step explanation:

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2

the answer is:

the lateral area is equal to

to find the lateral area of the square pyramid, first we need to find the perimeter of the base, and then, find the lateral area using the following formulas:

where,

s, is the base length

slant height, is the height of a the side of the pyramid

we are given:

now, calculating the perimeter of the base, we have:

then, calculating the lateral area:

hence, we have that the lateral area is equal to

have a nice day!