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

Before the eruption of a volcano, the volcano was 2.75 kilometers high. After the eruption, the volcano was 2.25 kilometers high. Find the difference in height of the volcano before and after the eruption, in meters.

Which represents the sample space of flipping a coin two times? What would be the probability of getting 2 heads? A) HT, TH : 1/2 B) HH, TT, HT, TH: 1/2 C) HH, HT, TT, TH: 1/4 D) HT, TH, TT, TH, HH: 1/5

Consider solving the equation for x 3 (3x + 4) - 5 = ax + b Which statements are true about the solution to the equation when substituting values for a and b as as specified? Select all that apply. A.

You wan to put some money in a simple interest account. It pays 8% interest annually for 2 years. You would like to earn $500 in interest. How much money do you need to put in?

How many real solutions are there x^2 + 3x + 10 = 0

Write the number six hundred and forty- nine thousand and six in figures

Write the number equal to five tens and 13 ones

Round 152,909 to nearest hundred thousand

One-third of 2c subtracted from five times nine

What is the missing value of - 5 = - 10 + ?