Each rectangular flag is 1.2 yards by 0.5 yard. the material costs $1.75 per square yard ?

Question

24. write a function showing the relationship between the number of flags and the cost of the material.

25. how much will it cost to make 20 flags?

Answer 1

you will need to find the area of the flag to know how much material you need for each flag. Area = 1.2yd x .5yd=.6yd squared.

so, .6x X $1.75=your amount

.6(20) X 1.75=$21

i hope that is right.

Answer 2

letting x = the number of flags, and C = the total cost, the function relating them is as follows:

C(x) = (1.75)(1.2)(0.5)x

or simply:

C(x) = 1.05x

for 20 flags:

C(20) = 1.05(20) = $21

that's it! ;)

Answer 3

the cost of 1 flag is:

1.2 × 0.5 = 0.6 square yards (you should know without calculator)

0.6 × $1.75 = $1.05 per flag.

so if C is the cost and F is the amount of flags, the function is:

C=1.05×F

done

If you make 20 flags that means F = 20

So if we fill that in we get:

C=1.05×20

C=21

done