Which function is a quadratic function?

What times 2 Gives me 63

8 less than a number 7 times a number is the same as 4 more than 3 times the number. Find the number

A windowpane is 6.8 inches tall and the diagonal distance from one corner to the other is 9.6 inches. How wide is the windowpane? If necessary, round to the nearest tenth.

What is the slope of the line which passes through (4,5) and (0,1)

The cost of 2.5 pounds of cheese is $5.60. Mrs Peterson bought 9 pounds of cheese for her deli how much did she spend

A car travels 3 hours at 50mph; then travels 40mph for 7 hours. How many miles does it travel during the 10 hours?

A total of 449 tickets were sold for the school play. they were either adult tickets or student tickets. there were 51 fewer student tickets sold than adult tickets. how many adult tickets were sold?

The price of 1kg of apples is 0.85$. What is the price of 200 grams of apples?

Express 900 as a product of its prime factors in index form. Write the prime factors in ascending factors.

The equation 3x+4=5x-4 has the solution set {4}. explain why the equation (3x+4) + 4=5x-4) + 4 also has the solution set {4}