Answer:
13×36
Step-by-step explanation:
the angle wants you to multiply 13×36
Answer:
Combined equation is 
Step-by-step explanation:
a varies directly as b and inversely as c.
This can be written as
a =
a = kb
where k is the proportionality constant
-------------------------------------(1)
Now lets find the k value bu substituting the given a, b,c values


36 = 12 k

k = 3
Thus the eq(1) becomes

Let us now find the value of a when b=7 and c = 3


a = 7
I feel like there's not enough information to answer this question. was this the whole question?
Answer:
a = 
Step-by-step explanation:
4a -16 = a - 15
both left and right -a
then
4a - 16 -a = a - 15 -a
then
4a -a -16 = a -a -15
then
3a -16 = -15
both left and right + 16
then
3a -16 + 16 = -15 + 16
then
3a = 1
both left and right ÷3
then
3a ÷ 3 =1 ÷ 3
then
a = 