Questions in mathematics

Questions in mathematics

[Done] If \( A + B = 76 \) \( A - B = 38 \) Find \( A \div B \).

[Done] During 4 days, the price of the stock of PEV Corporation went up 1/4 of a point, down 1/3 of a point, and up 7/10 of a point. What is the net change?

[Done] The area of a 25-inch TV screen is 300 square inches. The area of a 40-inch TV screen is 768 square inches. The area of the smaller screen is what percent of the larger screen?

[Done] A building measuring 90 m by 60 m is to be built. A paved area of uniform width will surround the building. The paved area is to have an area of 9000 square meters. How wide is the paved area?

[Done] 283.85 g + 6,204 mg + 0.00039 kg How many total grams of chemical did they mix together?

[Done] if a 35 year old women has averaged 8 hours of sleep each 24 hours how many days of her life has she spent

[Done] In insects, what does the blood transport? What is not transported by the blood?

[Done] Find the vertex and x-intercepts of the function: \[ y = -x^2 - 6x - 5 \]

[Done] Solve by completing the square: \[ x^2 + 14x - 51 = 0 \]

[Done] A chef holds a 55 g egg above the floor. The egg has 0.65 J of gravitational potential energy. How far above the ground is the egg?