A zoo has 151515 Emperor penguins. The Emperor penguins make up 30%, percent of all the penguins at the zoo.

How many penguins live at the zoo?

Mark and peter went to an arcade where the machines took tokens. Marilk played 9 games of ping pong and 5 games of pinball, using a total of 29 tokens. At the same time, peter played 3 games of ping pong and 1 game of pinball using up 7 tokens.

A diver is descending to reach the bottom of a lake. After 15 seconds, she is 90 feet below the surface of the water.

Derive the equation of the parabola with a focus at (6, 2) and a directrix of y = 1. f (x) = - 1/2 times (x - 6) ^2 + 3/2 f (x) = 1/2 times (x - 6) ^2 + 3/2 f (x) = - 1/2 times (x + 3/2) ^2 + 6 f (x) = 1/2 times (x + 3/2) ^2 + 6

Solve for x: 6/x + 2/2x = 8/x + 1/3

Abbey gets paid a flat rate of $10.00 to mow her neighbors lawn plus a additional $5 per hour to rakes the leaves.

Travel Ez sells dollars at a rate of ($1.40) / (1 euro) and buys dollars at a rate of ($1.80) / (1 euro). At the beginning of a trip, Sophie exchanged $540 to get 300 euros.

What is the range of y = square root x+7+5?

Is to a solution of the equation 3x+6=6x?

What would - 9 1/2 be as a decimal?

Write the inequality that represents "-5o is warmer that - 8o." (o=temperature)