5 times 2 is 10 4 dollars for greens 2 times 3 is 6 10+4+6 is 20 dollars. Noah spent $20
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Given that z is directly proportional to x, then:
zαx
hence;
z=kx
therefore:
k=z/x
when x=3,z=54
thus;
k=54/3
=18
hence;
z=18x
therefore the value of z when x=12 will be:
z=18*12
z=216
The answer is z=216
Hello,
Please, see the attached file.
Thanks.