Why can't the coefficient of x and y be zero

A person invests $2560 in an account that earns 5.2% annual interest. find when the value of the investment reaches $6000

A solid plastic ball is a sphere with radius 14 in. How much plastic does it take to make one ball?

What is 8g-6 (g+1) <4 (2g-9)

What percent is 3 out of 70

Evaluate when x = - 3 f (x) = - 2x-3

There were 149 angelfish and goldfish in an aquarium. There were twice as many guppies as angelfish. After selling 35 goldfish, there are half as many goldfish as angelfish. How many fish are left in the aquarium?

Which statement can be concluded using the true statements? If a quadrilateral has 4 equal sides and 4 equal angles, then it is a square. If a figure is a square, then each of its angles must measure 90 degrees

Maxine works at an amusement park. She recorded the number of ice cream cones sold each day, along with the high temperature in fahrenheit degrees. Usinger her data, she wrote a linear regression equation of y=9x-487.

Running consumes about 720 calories per hour about how many are used if you run for 40 minutes

Convert 160 kilometers to miles (to the nearest tenth).