The altitude a (in feet) of a plane t minutes after liftoff is given by a=3400t+600 . How many minutes after liftoff is the plane at an altitude of 21,000 feet?

The altitude a (in feet) of a plane t minutes after liftoff is given by a=3400t+600 . How many minutes after liftoff is the plane at an altitude of 21,000 feet?

John has 3 more birds than cats. He has 11 pets in all. How many cats does he have

Be sure to tell what quantities are represented by the variables, b and w

I need help with this word problem .

you can represent an odd integer with the expression 2n+1, where n is any integer. Write and solve an equation to find three consecutive odd integers that have a sum of 63.

if the sum of a number and 7 is divided by 4, the result is 19 more than the number, what is the equation?

I am really confused with word problems and it frustrating to me.

Show me work and equation like solve it

I need to know how much the phone bill is for this equation.

F(-2)

The patio is 64 feet long. the width is 12 feet and the length is (x+6). What is the length of the patio

The shadow of the goal is 18 ft tall how tall is the goal

Need answer in the form of T ( X+u) = T (-X+ u)Bobby paddles his canoe in tranquil waters at 3 miles per hour for two hours.He then encounters a current in his direction and paddles with the...

The answer is 6, but I don't understand the "why."

Alycia opens her piggy bank to find only quartersquarters and nickelsnickels inside. She counts the coins and finds that she has 3434 coins totaling $3.903.90. How many quartersquarters were in the...

Two planes leave an airport the same time and travel in opposite directions one player averages 300 mph another plane averages 600 mph when will they be 2700 miles apart

The person will spend how many years sleeping and how many years watching tv.

To make a shelf to display his Star Wars collection, Mr . Van Mayte bought wood and nails. Each yard of wood cost $27 and each box of nails cost $4. He bought 6 fewer boxes of nails than yards of...

Confused just dosent make sense

it says to evaluate the following expressions. I can see answer but don't understand how they got it. 1 2/9 + 7 5/6=