If x/a = 4, a/y = 6, a2 = 9 and ab2 = −8 then x + 2y = ?
select one:
a. −10
b. −15
c. −5
d. −13

-13

Step-by-step explanation:

We are given:

Since then has to be negative.

Solving therefore gives .

(Note: .)

and gives us:

.

Multiplying both sides by -3 gives: .

and gives us:

.

Multiplying both sides by gives: .

Divide both sides by 6 gives: .

Simplifying this gives us .

Now we are asked to find the numerical value for .

D.

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.