15. What is the sum of a number and its

opposite?

Is 16 a prime number?

Simplify. Rewrite the expression in the form 5n. 5 (2) x 5 (5) =

Is it true that since sin2x+cos2x = 1, then sin (x) + cos (x) = 1? Explain your answer.

Evaluate the expression. - 3 + (-2)

Is the square root of 245 rational or irrational

Daniel works at a nearby electronics store. He makes a commission of 15% on everything he sells. If he sells a laptop for 293.00 how many money does Daniel make in commission

The label on the car's antifreeze container claims to protect the car between - 30C and 130C. To convert Celsius temperature to Fahrenheit temperature, the formula is C = 5/9 (F-32).

Simplify the expression 3 (9+4x-5)

Paige was counting her change. she counted six pennies and two times as many dimes as pennies. she also counted three nickels and forty times as many quarters as nickels. How much money did Paige have. Explain how you got your answer.

What is the slope-intercept form of y + 6 = 2 (x + 2) ?