Determine if the graph of the function is concave up or concave down.

1. f (x) = - 4x^2 - 2x - 8

2. y = 2 (x+5) ^2 + 5

3. y = - 1/5 (x+1) ^2 - 1

The RideEm Bicycles factory can produce 110 bicycles in a day at a total cost of $10,900 and it can produce 130 bicycles in a day at a total cost of $11,600. What are the company's daily fixed costs? What is the marginal cost per bicycle?

12.73+0.06x=13.48+0.14x

Solve this inequality showing all work:-2 * + 4<16

Suppose angle 4=82 find angle 5

Check all that are equivalent to 256. numbers are 28, 44, 162, 1282

In a probability experiment, Eric flipped a coin 30 times. The coin landed on heads 20 times. What is the ratio of heads to tails in this experiment?

Which amount is less 250 mL or 250 L

What is the probability against drawing the ace of diamonds from a standard deck of 52 cards

How can you find the perimeter of the rhombus? Find (QS) (RT). Find (QT) (TS). Use the distance formula to find QT, then multiply by 4. Use the distance formula to find QT and QR, add the distances, then multiply by 4.

Jack drives an 18 wheeler. The truck's gas tank holds 105 gallons of gasoline. The driver begins the trip with a full tank. At his first stop his tank is 65% full. How much gasoline did he use?