Answer:
z=12
Step-by-step explanation:
It is given that x varies jointly as y and z, it means



where, k is the constant of proportionality.
It is given that x=8 when y=4 and z=9


Divide both sides by 36.


The value of k is 2/9.

We need to find the value of z when x=16 and y=6.
Substitute x=16 and y=6 in the above equation.


Multiply both sides by 3.

Divide both sides by 4.

Therefore, the value of z is 12.
Answer: A(3,4) A'(-3,4)
B(5,4) B'(-5,4)
C(4,2) C'(-4,2)
D(2,2) D'(-2,2)
Step-by-step explanation:
Answer:
A. 710
B. 21000
C. ?
D. ?
E.?
F.?
G. 0
H. 110000
Step-by-step explanation:
I can't understand the questions on some of them
231 / 385 = 0.6 diving the price it is by the price is was gives the answer
= 60%