Ahippopotamus can stay under water for 15 minutes. a sea cow can stay under water y minutes. this is 11 minutes longer than one-third the time a hippopotamus can. write an equation and solve to determine how long the sea cow can stay under water.

The sea cow can stay under water for 16 minutes.

Step-by-step explanation:

A hippopotamus can stay under water for 15 minutes.

A sea cow can stay under water minutes and this is 11 minutes longer than one-third the time a hippopotamus can.

So, "11 minutes longer than one-third the time a hippopotamus can" means:  

Thus, the equation will be:  

Now, solving the above equation, we will get.........

So, the sea cow can stay under water for 16 minutes.

the monthly balance will be $75,000

d, x=8

step-by-step explanation:

simplifying

4x + -5 = 2x + 11

reorder the terms:

-5 + 4x = 2x + 11

reorder the terms:

-5 + 4x = 11 + 2x

solving

-5 + 4x = 11 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-5 + 4x + -2x = 11 + 2x + -2x

combine like terms: 4x + -2x = 2x

-5 + 2x = 11 + 2x + -2x

combine like terms: 2x + -2x = 0

-5 + 2x = 11 + 0

-5 + 2x = 11

add '5' to each side of the equation.

-5 + 5 + 2x = 11 + 5

combine like terms: -5 + 5 = 0

0 + 2x = 11 + 5

2x = 11 + 5

combine like terms: 11 + 5 = 16

2x = 16

divide each side by '2'.