Zach is 4 years older than twice his sister maya’s age. maya is 5 years old. how old is zach?

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

Which of the following expressions is equal to 2x^2+8