A container is being filled with water at a steady rate. The graph shows how the volume of water in the container varies with the amount of time since the container began filling. We see that there are 4 gallons of water in the container when the container has been filling for 5 minutes. a. Define a formula to determines the volume (in gallons) of water in the container, v , in terms of the number of minutes, t, since the container began to fill.

 a. and b. .

Step-by-step explanation:

Let as consider,

Volume (in gallons) of water in the container = v

The number of minutes = t

(a)

From the given graph it is clear that the line passing through the points (0,0) and (3,2). So, the equation of line is

Therefore, the required formula is .

(b)

We have,

Multiply both sides by 3/2.

Therefore, the required formula is .

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)