Answer: option d.
Step-by-step explanation:
If <em>y </em>varies directly as <em>x</em> and <em>z</em>, the form of the equation is:

Where<em> k</em> is the constant of variation.
If y=4 when x=6 and z=1 then substitute these values into the expression and solve for <em>k:</em>

<em> </em>Substitute the value of <em>k</em> into the expression. Then, the equation is:

To find the value of <em>y </em>when x=7 and z=4, you must substute these values into the equation. Therefore you obtain:


<em> </em>
Easy, take:
p-4=-9+p
Isolate the variable, this is what you are trying to find (p)
p-4=-9+p
-p -p
-4=-9.
There is no variable, which means, there is NO SOLUTION!
You can put no solution, or ∅, as an answer.
Answer:
B
Step-by-step explanation:
The other answers don't divide into rational numbers
Answer:
8
Step-by-step explanation:
4x +5 = 37
4x + 5 - 5 = 37 - 5
4x = 32
4x/4 = 32/4
x = 8
hope this helps