Adding negative numbers

Add.

7 + (-7) =

A parallelogram is always which of these? rhombus quadrilateral rectangle square

Which ordered pair is the best estimate for the solution of the system of equations? y = - 1/5x + 1 y = x + 4

A school needs 75 light bulbs. Bulbs come in packages of 8. How many packages should the school order?

Select the polynomial that is a perfect square trinomial. A. 49x^2 - 8x + 16 B. 4a^2 - 10a + 25 C. 25b^2 - 5b + 10 D. 16x^2 - 8x + 1

The shapes of the horizontal cross-sections of the cylinder below are all congruent. O A. True B. False

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.