About what percent is oxygen than silicon on the earths crust

In geometry a train metal tracks and Wooden ties would be Parrell, Skew, perpendicular or none?

Fractions between 1/3 and 1/4

What does a cell do to a substances in endocytosis?

What number is a common denominator for 3/8 and 1/3

The cost of producing x soccer balls in thousands of dollars is represented by h (x) = 5x+6 the revenue is represented by k (x) = 9x-2 which expression represents the profit (k-h) (x) of producing soccar balls A) 14x-8 B) 14x+4 C) 4x-8 D) 4x+4

Two cities are 15.7 cm apart on a map that has a scale of 1 cm : 14 km. These cities are 211.4 km apart.

find the total cost of a $55.00 dinner bill including 7% tax and 18% tip. how much change will you get back from $100.00

The number 4.124 has two 4s. Why does each 4 have a different value?

What is 3/10-2/5= Is it 1/2?

Solve for x 4x - 4 < 8