Three vectors a, b, and c are related to one another such that 2a + 3b = 18c. a fourth vector d exists such that 6c + d = a. determine an expression for d in terms of the vectors a and b.

we are given equations of vectors as

now, we want to find an expression for d in terms of the vectors a and  b

so, we can eliminate c from second equation

so, we will solve for c from first equation

divide both sides by 18

we get

now, we can plug this in second equation

we can simplify it

..............Answer

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right

you meant circumference well the answer is:

17.27876 miles

area is 23.7583

the radius is 2.75 miles

hope this hmu if needed.