I don't understand this:

F (9) if f (x) = x+13

How many hundreds in 1.85?

Which equation could be used to solve the problem? Oscar averaged 4 yards per carry in the football game. If he carried the ball 16 times, how many yards did he gain (y) ? A. y = 4 • 16 B. y = 4 + 16 C. y = 4 : 16 D. y = 16 : 4

He needs a down payment of $3000. If he saves $340 each month, about how many months will it take him to save the down payment?

Find both unit rates. 374 students for every 20 teachers A. About 0.053 students/teachers and 18.7 teachers/students B. 374 students/teachers and 18.7 teachers/students C. 18.7 students/teachers and about 0.053 teachers/students D.

Identify the equations that have one solution, infinitely many solutions, or no solution. A. 1/2y + 3.2y = 20 B. 15/2 + 2z = 1/4 = 4z + 29/4 - 2z C. 3z + 2.5 = 3.2 + 3z D. 1.1 + 3/4x + 2 = 3.1 = 3/4x E. 4.5r = 3.2 + 4.5r F. 2x + 4 = 3x + 1/2

Use the formula F=1.8C+32 to convert - 20° into fahrenheit.

Solve in the correct order: (-3 - 4) / - 9 A) - 7/-9 B) - 7/9 C) 7/9 D) - 1/9

Suppose a lab needs to make 400 liters of a 39% acid solution, but the only solutions available to the lab are 20% acid and 50% acid.

If the price is $40, the number of units sold is 450, and the average cost is $33, what is the profit?

Kevin borrowed $8000 at a rate of 9.5%, compounded quarterly. Assuming he makes no payments, how much will he owe after 6 years? Do not round any intermediate computations, and round your answer to the nearest cent.